Substituted arylamine derivatives and methods of use

ABSTRACT

Selected compounds are effective for prophylaxis and treatment of diseases, such as angiogenesis mediated diseases. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable derivatives thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving, cancer and the like. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.

This application is a continuation of U.S. patent application Ser. 10/823,809 filed Apr. 12, 2004 which is a continuation of U.S. patent application Ser. No. 10/197,960 filed Jul. 17, 2002 which is a continuation-in-part of U.S. patent application Ser. No. 10/046,526 filed Jan. 10, 2002 claiming the benefit of U.S. Provisional Application Nos. 60/261,360, filed Jan. 12, 2001, and 60/323,686 filed Sep. 19, 2001, which are hereby incorporated by reference.

FIELD OF THE INVENTION

This invention is in the field of pharmaceutical agents and specifically relates to compounds, compositions, uses and methods for treating cancer and angiogenesis-related disorders.

BACKGROUND OF THE INVENTION

Protein kinases represent a large family of proteins which play a central role in the regulation of a wide variety of cellular processes, maintaining control over cellular function. A partial list of such kinases includes ab1, Akt, bcr-ab1, Blk, Brk, Btk, c-kit, c-met, c-src, CDK1, CDK2, CDK3, CDK4, CDK5, CDK6, CDK7, CDK8, CDK9, CDK10, cRaf1, CSF1R, CSK, EGFR, ErbB2, ErbB3, ErbB4, Erk, Fak, fes, FGFR1, FGFR2, FGFR3, FGFR4, FGFR5, Fgr, flt-1, Fps, Frk, Fyn, Hck, IGF-1R, INS-R, Jak, KDR, Lck, Lyn, MEK, p38, PDGFR, PIK, PKC, PYK2, ros, tie, tie2, TRK, Yes, and Zap70. Inhibition of such kinases has become an important therapeutic target.

Certain diseases are known to be associated with deregulated angiogenesis, for example ocular neovascularisation, such as retinopathies (including diabetic retinopathy), age-related macular degeneration, psoriasis, hemangioblastoma, hemangioma, arteriosclerosis, inflammatory disease, such as a rheumatoid or rheumatic inflammatory disease, especially arthritis (including rheumatoid arthritis), or other chronic inflammatory disorders, such as chronic asthma, arterial or post-transplantational atherosclerosis, endometriosis, and neoplastic diseases, for example so-called solid tumors and liquid tumors (such as leukemias).

At the center of the network regulating the growth and differentiation of the vascular system and its components, both during embryonic development and normal growth, and in a wide number of pathological anomalies and diseases, lies the angiogenic factor known as Vascular Endothelial Growth Factor” (VEGF; originally termed ‘Vascular Permeability Factor”, VPF), along with its cellular receptors (see G. Breier et al., Trends in Cell Biology, 6:454-456 (1996)).

VEGF is a dimeric, disulfide-linked 46-kDa glycoprotein related to “Platelet-Derived Growth Factor” (PDGF); it is produced by normal cell lines and tumor cell lines; is an endothelial cell-specific mitogen; shows angiogenic activity in in vivo test systems (e.g. rabbit cornea); is chemotactic for endothelial cells and monocytes; and induces plasminogen activators in endothelial cells, which are involved in the proteolytic degradation of extracellular matrix during the formation of capillaries. A number of isoforms of VEGF are known, which show comparable biological activity, but differ in the type of cells that secrete them and in their heparin-binding capacity. In addition, there are other members of the VEGF family, such as “Placenta Growth Factor” (PlGF) and VEGF-C.

VEGF receptors (VEGFR) are transmembranous receptor tyrosine kinases. They are characterized by an extracellular domain with seven immunoglobulin-like domains and an intracellular tyrosine kinase domain. Various types of VEGF receptor are known, e.g. VEGFR-1 (also known as flt-1), VEGFR-2 (also known as KDR), and VEGFR-3.

A large number of human tumors, especially gliomas and carcinomas, express high levels of VEGF and its receptors. This has led to the hypothesis that the VEGF released by tumor cells stimulates the growth of blood capillaries and the proliferation of tumor endothelium in a paracrine manner and through the improved blood supply, accelerate tumor growth. Increased VEGF expression could explain the occurrence of cerebral edema in patients with glioma. Direct evidence of the role of VEGF as a tumor angiogenesis factor in vivo is shown in studies in which VEGF expression or VEGF activity was inhibited. This was achieved with anti-VEGF antibodies, with dominant-negative VEGFR-2 mutants which inhibited signal transduction, and with antisense-VEGF RNA techniques. All approaches led to a reduction in the growth of glioma cell lines or other tumor cell lines in vivo as a result of inhibited tumor angiogenesis.

Angiogenesis is regarded as an absolute prerequisite for tumors which grow beyond a diameter of about 1-2 mm; up to this limit, oxygen and nutrients may be supplied to the tumor cells by diffusion. Every tumor, regardless of its origin and its cause, is thus dependent on angiogenesis for its growth after it has reached a certain size.

Three principal mechanisms play an important part in the activity of angiogenesis inhibitors against tumors: 1) Inhibition of the growth of vessels, especially capillaries, into avascular resting tumors, with the result that there is no net tumor growth owing to the balance that is achieved between cell death and proliferation; 2) Prevention of the migration of tumor cells owing to the absence of blood flow to and from tumors; and 3) Inhibition of endothelial cell proliferation, thus avoiding the paracrine growth-stimulating effect exerted on the surrounding tissue by the endothelial cells which normally line the vessels. See R. Connell and J. Beebe, Exp. Opin. Ther. Patents, 11:77-114 (2001).

VEGF's are unique in that they are the only angiogenic growth factors known to contribute to vascular hyperpermeability and the formation of edema. Indeed, vascular hyperpermeability and edema that is associated with the expression or administration of many other growth factors appears to be mediated via VEGF production.

Inflammatory cytokines stimulate VEGF production. Hypoxia results in a marked upregulation of VEGF in numerous tissues, hence situations involving infarct, occlusion, ischemia, anemia, or circulatory impairment typically invoke VEGF/VPF-mediated responses. Vascular hyperpermeability, associated edema, altered transendothelial exchange and macromolecular extravasation, which is often accompanied by diapedesis, can result in excessive matrix deposition, aberrant stromal proliferation, fibrosis, etc. Hence, VEGF-mediated hyperpermeability can significantly contribute to disorders with these etiologic features. As such, regulators of angiogenesis have become an important therapeutic target.

Schipper U.S. Pat. No. 3,226,394, issued Dec. 28, 1965, describes anthranilamides as CNS depressants. Japanese patent JP 2000256358 describes pyrazole derivatives that block the calcium release-activated calcium channel. EP application 9475000, published 6 Oct. 1999, describes compounds as PGE₂ antagonists. PCT publication WO 96/41795, published Dec. 27, 1996, describes benzamides as vasopressin antagonists. WO 01/29009 describes aminopyridines as KDR inhibitors. WO 01/30745 describes anthranilic acids as CGMP phosphodiesterase inhibitors. WO 00/02851, published 20 Jan. 2000 describes arylsulfonylamnoaryl amides as guanylate cyclase activators. WO 98/45268 describes nicotinamide derivatives as PDE4 inhibitors. WO 98/24771 describes benzamides as vasopressin antagonists.

U.S. Pat. No. 5,532,358, issued Jul. 2, 1996, describes the preparation of 2-(cyclopropylamino)-N-(2-methoxy-4-methyl-3-pyridinyl)-3-pyridinecarboxamide as an intermediate for HIV inhibitors. Triazine-substituted amines are described for their aggregating ability (J. Amer. Chem. Soc., 115:905-916 (1993). Substituted imidazolines were tested for their antidepressant activity in Ind. J. Het. Chem., 2:129-132 (1992). N-(4-Pyridyl)anthranilic amides were described in Chem Abstr. 97:109837 (1981). PCT publication WO 99/32477, published 1 Jul. 1999, describes anthranilamides as anti-coagulants. U.S. Pat. No. 6,140,351 describes anthranilamides as anti-coagulants. PCT publication WO 99/62885, published 9 Dec. 1999, describes 1-(4-aminophenyl)pyrazoles as antiinflammatories. PCT publication WO 00/39111, published 6 Jul. 2000, describes amides as factor Xa inhibitors. PCT publication WO 00/39117, published 6 Jul. 2000, describes heteroaromatic amides as factor Xa inhibitors. PCT publication WO00/27819, published 18 May 2000, describes anthranilic acid amides as VEGF inhibitors. PCT publication WO 00/27820 published 18 May 2000, describes N-aryl anthranilic acid amides as VEGF inhibitors. 7-Chloroquinolinylamines are described in FR 2168227 as antiinflammatories. WO 01/55114, published 2 Aug. 2001, describes nicotinamides for the treatment of cancer. WO01/55115, published 2 Aug. 2001, describes nicotinamides for the treatment of apoptosis. WO 01/85715, published 15 Nov. 2001, describes substituted pyridines and pyrimidines as anti-angiogenesis agents. PCT publication WO 01/85691 published 15 Nov. 2001, describes anthranilic amides as VEGF inhibitors. PCT publication WO 01/85671 published 15 Nov. 2001, describes anthranyl amides as VEGF inhibitors. PCT publication WO 01/81311 published 1 Nov. 2001, describes anthranilic amides as VEGF inhibitors.

However, compounds of the current invention have not been described as inhibitors of angiogenesis such as for the treatment of cancer.

DESCRIPTION OF THE INVENTION

A class of compounds useful in treating cancer and angiogenesis is defined by Formula I

wherein each of A¹ and A² is independently C or N; wherein A¹-A² together are part of a ring A selected from 5- or 6-membered heteroaryl,

-   -   more preferably 5-membered heteroaryl selected from thienyl,         oxazolyl, imidazolyl, pyrrolyl, pyrazolyl, isoxazolyl,         triazolyl, isothiazolyl, and     -   6-membered heteroaryl selected from pyridyl, pyrazinyl,         pyrimidinyl and pyridazinyl,     -   even more preferably pyridyl or pyrimidinyl, most preferably         pyridyl;         wherein X is selected from     -   preferably         -   more preferably —C(O)—NH—;             wherein Z is oxygen or sulfur;             wherein Y is selected from     -   preferably selected from         -   more preferably —NH—CH₂—;             wherein R^(a) and R^(b) are independently selected from H,             halo, and C₁₋₄-alkyl substituted with R¹, or wherein R^(a)             and R^(b) together form C₃-C₄ cycloalkyl,     -   preferably H, halo, and C₁₋₂-alkyl substituted with R¹, or         wherein R^(a) and R^(b) together form C₃-C₄ cycloalkyl,         -   more preferably H, halo and C₁-C₂-alkyl,             -   even more preferably H;                 wherein R^(c) is C₁-C₄ alkylenyl, where one of the CH₂                 groups may be substituted with an oxygen atom or an                 —NH—,     -   preferably C₁-C₂ alkylenyl, where one of the CH₂ groups may be         substituted with an oxygen atom or an —NH—,         -   more preferably —CH₂—;             wherein R¹ is one or more substituents independently             selected from H, halo, —OR⁷, oxo, —SR⁷, —CO₂R⁷, —COR⁷,             —CONR⁷R⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷,             cycloalkyl, optionally substituted phenylalkylenyl,             optionally substituted 5-6 membered heterocyclyl, optionally             substituted heteroarylalkylenyl, optionally substituted             phenyl, lower alkyl, cyano, lower hydroxyalkyl, lower             carboxyalkyl, nitro, lower alkenyl, lower alkynyl, lower             aminoalkyl, lower alkylaminoalkyl and lower haloalkyl;     -   preferably H, halo, —OR⁷, oxo, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷,         —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, cycloalkyl,         optionally substituted 5-6 membered heterocyclyl, optionally         substituted phenyl, C₁-C₂-alkyl, cyano, C₁-C₂-hydroxyalkyl,         C₁-C₃-carboxyalkyl, nitro, C₂-C₃-alkenyl, C₂-C₃-alkynyl and         C₁-C₂-haloalkyl,         -   more preferably H, halo, —OR⁷, —SR⁷, —CO₂R⁷, —CONR⁷R⁷,             —COR⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷,             cycloalkyl, optionally substituted 5-6 membered             heterocyclyl, optionally substituted phenyl, C₁₋₂-alkyl,             cyano, C₁₋₂-hydroxyalkyl, C₁₋₃-carboxyalkyl, nitro,             C₂₋₃-alkenyl, C₂₋₃-alkynyl and C₁₋₂-haloalkyl,             -   additionally preferred are H, chloro, fluoro, bromo,                 amino, hydroxy, methyl, ethyl, propyl, trifluoromethyl,                 methoxy, ethoxy, trifluoromethoxy, carboxymethyl,                 unsubstituted or substituted phenyl and unsubstituted or                 substituted heteroaryl selected from thienyl, furanyl,                 pyridyl, imidazolyl, and pyrazolyl;                 wherein R² is selected from     -   a) substituted or unsubstituted 6-10 membered aryl,     -   b) substituted or unsubstituted 5-6 membered heterocyclyl,     -   c) substituted or unsubstituted 9-11 membered fused         heterocyclyl,     -   d) cycloalkyl, and     -   e) cycloalkenyl,         -   preferably substituted or unsubstituted aryl selected from             phenyl, naphthyl, indenyl and tetrahydronaphthyl,             substituted or unsubstituted 5-6 membered heteroaryl, and             substituted or unsubstituted 9-10 membered fused heteroaryl,         -   more preferably phenyl, indazolyl, indolyl,             2,1,3-benzothiadiazolyl, isoquinolyl, quinolyl, and             quinazolinyl,             -   even more preferably phenyl, indazolyl, indolyl,                 isoquinolyl and quinolyl;     -   wherein substituted R² is substituted with one or more         substituents independently selected from halo, —OR⁷, —SR⁷,         —SO₂R⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —SO₂NR⁷, —NR⁷C(O)OR⁷,         —NR⁷C(O)R⁷, —NH(C₁-C₄ alkylenylR⁷), optionally substituted         cycloalkyl, optionally substituted 5-6 membered heterocyclyl,         optionally substituted phenyl, lower alkyl substituted with R¹,         cyano, nitro, lower alkenyl and lower alkynyl,     -   preferably halo, —OR⁷, —SR⁷, —SO₂R⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷,         —NR⁷R⁷, —NH(C₁-C₂-alkylenylR⁷), —(C₁-C₂-alkylenyl)NR⁷R⁷,         —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, optionally substituted         cycloalkyl, optionally substituted 5-6 membered heterocyclyl,         optionally substituted phenyl, optionally substituted         phenyl-C₁-C₂-alkylenyl, optionally substituted 5-6 membered         heterocyclyl-C₁-C₂-alkylenyl, C₁-C₂-alkyl, cyano,         C₁-C₂-hydroxyalkyl, nitro and C₁-C₂-haloalkyl,         -   more preferably halo, —OR⁷, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷,             —NR⁷R⁷, —NH(C₁-C₂-alkylenyl-R⁷), —(C₁-C₂-alkylenyl)NR⁷R⁷,             —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, optionally substituted             cycloalkyl, optionally substituted 5-6 membered             heterocyclyl, optionally substituted phenyl, optionally             substituted phenyl-C₁-C₂-alkylenyl, optionally substituted             5-6 membered heterocyclyl-C₁-C₂-alkylenyl, C₁-C₂-alkyl,             cyano, C₁-C₂-hydroxyalkyl, nitro and C₁-C₂-haloalkyl,             -   additionally preferred are chloro, fluoro, amino,                 hydroxy, cyclohexyl, phenylmethyl, morpholinylmethyl,                 methylpiperdinylmethyl, methylpiperazinylmethyl, ethyl,                 propyl, trifluoromethyl, phenyloxy, methoxy and ethoxy;                 wherein R³ is selected from aryl, preferably phenyl;                 wherein R³ is substituted with one or more substituents                 independently selected from halo, —OR⁷, —SR⁷, —CO₂R⁷,                 —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)O R⁷,                 —NR⁷C(O)R⁷, cycloalkyl, optionally substituted 5-6                 membered heterocyclyl, optionally substituted                 heteroarylalkylenyl, optionally substituted phenyl,                 lower alkyl substituted with R¹, cyano, nitro, lower                 alkenyl and lower alkynyl,     -   preferably halo, —OR⁷, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷,         —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, cyano, lower hydroxyalkyl,         lower aminoalkyl and nitro,         more preferably halo, —OR⁷, —CONR⁷R⁷, —NR⁷R⁷, —SO₂NR⁷R⁷,         —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, cyano, amino-C₁-C₂-alkyl,         hydroxy-C₁-C₂-alkyl, and nitro,         -   -   even more preferably chloro, fluoro, amino, hydroxy,                 hydroxymethyl, aminomethyl, nitro, methoxy and ethoxy;                 wherein R⁴ is independently selected from C₂-C₄                 alkylenyl, C₂-C₄ alkenylenyl and C₂-C₄ alkynylenyl,                 where one of the CH₂ groups may be substituted with an                 oxygen atom or an —NH—,     -   preferably C₂₋₃-alkylenyl, where one of the CH₂ groups may be         substituted with an oxygen atom or an —NH—;         wherein R⁵ is selected from H, lower alkyl, phenyl and lower         aralkyl,     -   preferably H or C₁₋₂-alkyl;         wherein R⁶ is selected from H or C₁₋₆-alkyl; and         wherein R⁷ is selected from H, lower alkyl, phenyl, 5-6 membered         heterocyclyl, C₃-C₆ cycloalkyl, and lower haloalkyl,     -   preferably H, C₁₋₂-alkyl, phenyl, C₃-C₆ cycloalkyl and         C₁₋₂-haloalkyl,         -   more preferably H, methyl, ethyl, cyclopropyl, cyclohexyl             and trifluoromethyl;             and pharmaceutically acceptable salts thereof;             provided R³ is substituted with one or more radicals             selected from —OR⁷, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷,             lower aminoalkyl, lower alkylaminoalkyl, —SO₂NR⁷R⁷,             —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, cyano or lower hydroxyalkyl.

The invention also relates to compounds of Formula II

wherein each of A³ and A⁴ is independently C or N, provided at least one of A³ and A⁴ is N; wherein n is 1-2; wherein R¹ is one or more substituents independently selected from H, chloro, fluoro, bromo, amino, hydroxy, methyl, ethyl, propyl, trifluoromethyl, methoxy, ethoxy, trifluoromethoxy, carboxymethyl, unsubstituted or substituted phenyl and unsubstituted or substituted heteroaryl selected from thienyl, furanyl, pyridyl, imidazolyl and pyrazolyl; wherein R² is selected from phenyl, isoquinolyl and quinolyl, where R² is unsubstituted or substituted with one or more substituents selected from chloro, fluoro, amino, hydroxy, cyclohexyl, phenylmethyl, morpholinylmethyl, methylpiperdinylmethyl, methylpiperazinylmethyl, ethyl, propyl, trifluoromethyl, phenyloxy, methoxy and ethoxy; and wherein R⁸ is one or more substituents independently selected from chloro, fluoro, methyl, cyano, amino, hydroxy, aminomethyl, hydroxymethyl, nitro, methoxy and ethoxy; and pharmaceutically acceptable salts thereof; provided R⁸ is one or more radicals selected from amino, cyano, aminomethyl, hydroxymethyl, hydroxy, methoxy and ethoxy.

A class of compounds useful in treating cancer and angiogenesis is defined by Formula I′

wherein each of A¹ and A² is independently C or N;

-   -   wherein A¹-A² form part of a ring A selected from 5- or         6-membered heteroaryl,     -   preferably         -   I) 5-membered heteroaryl selected from thienyl, furanyl,             pyrrolyl, thiazolyl, oxazolyl, imidazolyl, pyrazolyl,             isoxazolyl, triazolyl and isothiazolyl,             -   even more preferably 5-membered heteroaryl selected from         -   II) preferably 6-membered heteroaryl selected from pyridyl,             pyrazinyl, pyrimidinyl, pyridazinyl, and triazinyl,             -   even more preferably 6-membered heteroaryl selected from                 -   specifically, pyridyl and pyrimidinyl,                 -    more specifically                     wherein X is     -   preferably X is         -   more preferably X is             wherein Z is oxygen or sulfur;     -   Y is selected from     -   preferably         -   more preferably —NH—CH₂—;             wherein p is 0 to 2,     -   preferably 2;         wherein R^(a) and R^(b) are independently selected from H, halo,         cyano, —NHR⁶ and C₁₋₄-alkyl substituted with R¹, or wherein         R^(a) and R^(b) together form C₃-C₆ cycloalkyl;     -   preferably H, halo, and C₁₋₂-alkyl substituted with R¹, or         wherein R^(a) and R^(b) together form C₃-C₄ cycloalkyl,         -   more preferably H, chloro, fluoro and C₁-C₂-alkyl,             -   even more preferably H;                 wherein R^(z) is selected from C₂-C₆-alkylenyl, where                 one of the CH₂ groups may be replaced with an oxygen                 atom or an —NH— group; wherein one of the CH₂ groups may                 be substituted with one or two radicals selected from                 halo, cyano, —NHR⁶ and C₁₋₄-alkyl substituted with R¹;     -   preferably C₂-C₃ alkylenyl, where one of the CH₂ groups may be         replaced with an oxygen atom or an —NH—,         -   more preferably —(CH₂)₂—;             wherein R^(d) is optionally substituted cycloalkyl,             preferably C₃₋₆-cycloalkyl;             wherein R¹ is one or more substituents independently             selected from H, halo, —OR⁷, oxo, —SR⁷, —CO₂R⁷, —COR⁷,             —CONR⁷R⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷,             optionally substituted cycloalkyl, optionally substituted             phenylalkyl, optionally substituted heterocyclyl, optionally             substituted heterocyclylalkyl, optionally substituted             phenyl, lower alkyl, cyano, lower hydroxyalkyl, lower             carboxyalkyl, nitro, lower alkenyl, lower alkynyl, lower             aminoalkyl, lower alkylaminoalkyl and lower haloalkyl,     -   preferably H, halo, —OR⁷, oxo, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷,         —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, optionally         substituted C₃₋₆-cycloalkyl, optionally substituted         phenyl-C₁₋₄-alkyl, optionally substituted 4-6 membered         heterocyclyl, optionally substituted phenyl, optionally         substituted 4-6 membered heterocyclyl-C₁₋₄-alkyl, C₁₋₆-alkyl,         cyano, C₁₋₄-hydroxyalkyl, C₁₋₄-carboxyalkyl, nitro,         C₂₋₃-alkenyl, C₂₋₃-alkynyl and C₁₋₄-haloalkyl,         -   more preferably H, halo, hydroxy, C₁₋₂-alkoxy,             C₁₋₂-haloalkoxy, amino, C₁₋₂-alkylamino, optionally             substituted 4-6 membered heterocyclyl-C₁₋₂-alkylamino,             aminosulfonyl, C₃₋₆-cycloalkyl, optionally substituted 4-6             membered heterocyclyl, optionally substituted phenyl,             C₁₋₄-alkyl, cyano, C₁₋₂-hydroxyalkyl, C₁₋₃-carboxyalkyl,             nitro, C₂₋₃-alkenyl, C₂₋₃-alkynyl and C₁₋₂-haloalkyl, and             -   even more preferably H, chloro, fluoro, bromo, hydroxy,                 methoxy, ethoxy, trifluoromethoxy, oxo, amino,                 dimethylamino, aminosulfonyl, carboxymethyl,                 cyclopropyl, optionally substituted phenyl, methyl,                 ethyl, propyl, cyano, hydroxymethyl, nitro, propenyl,                 propynyl, trifluoromethyl and unsubstituted or                 substituted heteroaryl selected from                 -   thienyl, furanyl, pyridyl, imidazolyl and pyrazolyl;                     wherein R² is selected from     -   a) substituted or unsubstituted 6-10 membered aryl,         -   preferably phenyl, naphthyl, benzodioxolyl, indanyl, indenyl             and tetrahydronaphthyl,             -   more preferably phenyl, indanyl, tetrahydronaphthyl, and                 naphthyl,     -   b) substituted or unsubstituted 5-6 membered heterocyclyl,         -   preferably 5-6 membered heteroaryl,             -   more preferably isoxazolyl, pyrazolyl, thiazolyl,                 thiadiazolyl, thienyl, pyridyl, pyrimidinyl,                 pyridazinyl, imidazolyl, oxazolyl, furyl and pyrrolyl,     -   c) substituted or unsubstituted 9-14 membered bicyclic or         tricyclic heterocyclyl,         -   preferably 9-10 membered bicyclic or 13-14 membered             tricyclic heterocyclyl,             -   more preferably indazolyl, indolyl, isoindolyl,                 2,3-dihydro-1H-indolyl, naphthyridinyl,                 2,1,3-benzothiadiazolyl, isoquinolyl, quinolyl,                 1,2-dihydroquinolyl, 1,2,3,4-tetrahydro-isoquinolyl,                 2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl,                 5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl,                 3,4-dihydro-2H-benzo[1,4]oxazinyl, benzothienyl,                 tetrahydroquinolyl, benzofuryl, benzimidazolyl,                 benzoxazolyl, benzthiazolyl, benzodioxanyl and                 quinazolinyl,                 -   even more preferably 9-10 membered bicyclic or 13-14                     membered tricyclic saturated or partially                     unsaturated heterocyclyl,                 -   specifically 1,2-dihydroquinolyl,                     1,2,3,4-tetrahydro-isoquinolyl,                     1,2,3,4-tetrahydro-quinolyl, 2,3-dihydro-1H-indolyl,                     2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl,                     5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl,                     3,4-dihydro-2H-benzo[1,4]oxazinyl, and                     benzo[1,4]dioxanyl;     -   d) cycloalkyl,         -   preferably C₃₋₆-cycloalkyl,             -   more preferably cyclohexyl, and     -   e) cycloalkenyl,     -   wherein substituted R² is substituted with one or more         substituents independently selected from halo, —OR⁷, oxo, —SR⁷,         —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —NH(C₁-C₄ alkylenylR⁹), —SO₂R⁷,         —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, —NR⁷C(O)NR⁷R⁷, optionally         substituted cycloalkyl, optionally substituted heterocyclyl,         optionally substituted phenyl, halosulfonyl, cyano,         alkylaminoalkoxy, alkylaminoalkoxyalkoxy, nitro, lower alkyl         substituted with R¹, lower alkenyl substituted with R¹, and         lower alkynyl substituted with R¹,         -   preferably halo, —OR⁷, oxo, —SR⁷, —SO₂R⁷, —CO₂R⁷, —CONR⁷R⁷,             —COR⁷, —NR⁷R⁷, —NH(C₁-C₂-alkylenylR⁹),             —(C₁-C₂-alkylenyl)NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷,             C₁-C₆-alkylamino-C₁-C₆-alkoxy,             C₁-C₆-alkylamino-C₁-C₆-alkoxy-C₁-C₆-alkoxy, halosulfonyl,             optionally substituted 4-6 membered             heterocyclyl-carbonylalkyl,             C₁₋₄-alkoxycarbonylamino-C₁₋₆-alkyl,         -    optionally substituted C₃₋₆-cycloalkyl, optionally             substituted 4-6 membered heterocyclyl, optionally             substituted phenyl, optionally substituted             phenyl-C₁₋₆-alkylenyl, optionally substituted 4-6 membered             heterocyclyl-C₁-C₆-alkylenyl, 4-6 membered             heterocyclyl-C₂-C₆-alkenylenyl, C₁₋₄-alkyl, cyano,             C₁₋₄-hydroxyalkyl, nitro and C₁₋₄-haloalkyl,             -   more preferably halo, C₁₋₄-alkyl, optionally substituted                 C₃₋₆-cycloalkyl, optionally substituted phenyl,                 optionally substituted phenyl-C₁-C₄-alkylenyl,                 C₁₋₂-haloalkoxy, optionally substituted phenyloxy,                 optionally substituted 4-6 membered                 heterocyclyl-C₁-C₄-alkylenyl, optionally substituted 4-6                 membered heterocyclyl-C₂-C₄-alkenylenyl, optionally                 substituted 4-6 membered heterocyclyl, optionally                 substituted 4-6 membered heterocyclyloxy, optionally                 substituted 4-6 membered heterocyclylsulfonyl,                 optionally substituted 4-6 membered heterocyclylamino,                 optionally substituted 4-6 membered                 heterocyclylcarbonyl, optionally substituted 4-6                 membered heterocyclyl-C₁₋₄-alkylcarbonyl,                 C₁₋₂-haloalkyl, C₁₋₄-aminoalkyl, nitro, amino, hydroxy,                 cyano, aminosulfonyl, C₁₋₂-alkylsulfonyl, halosulfonyl,                 C₁₋₄-alkylcarbonyl, C₁₋₃-alkylamino-C₁₋₃-alkyl,                 C₁₋₃-alkylamino-C₁₋₃-alkoxy,                 C₁₋₃-alkylamino-C₁₋₃-alkoxy-C₁₋₃-alkoxy,                 C₁₋₄-alkoxycarbonyl,                 C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl, C₁₋₄-hydroxyalkyl,             -    and C₁₋₄-alkoxy,                 -   even more preferably bromo, chloro, fluoro, iodo,                     nitro, amino, cyano, aminoethyl, Boc-aminoethyl,                     hydroxy, aminosulfonyl, 4-methylpiperazinylsulfonyl,                     cyclohexyl, phenyl, phenylmethyl, morpholinylmethyl,                     methylpiperazinylmethyl, morpholinylethyl,                     methylpiperazinylpropyl,                     1-(4-morpholinyl)-2,2-dimethylpropyl,                     piperidinylmethyl, morpholinylpropyl,                     methylpiperidinylmethyl, piperidinylethyl,                     piperidinylpropyl, pyrrolidinylpropyl,                     pyrrolidinylpropenyl, pyrrolidinylbutenyl,                     fluorosulfonyl, methylsulfonyl, methylcarbonyl,                     piperidinylmethylcarbonyl,                     methylpiperazinylcarbonylethyl, methoxycarbonyl,                     3-ethoxycarbonyl-2-methyl-fur-5-yl,                     methylpiperazinyl, methylpiperidyl,                     1-methyl-(1,2,3,6-tetrahydropyridyl), imidazolyl,                     morpholinyl, 4-trifluoromethyl-1-piperidinyl,                     hydroxybutyl, methyl, ethyl, propyl, isopropyl,                     butyl, tert-butyl, sec-butyl, trifluoromethyl,                     pentafluoroethyl, nonafluorobutyl,                     dimethylaminopropyl,                     1,1-di(trifluoromethyl)-1-hydroxymethyl,                     trifluoromethoxy,                     1,1-di(trifluoromethyl)-1-(piperidinylethoxy)methyl,                     1,1-di(trifluoromethyl)-1-(methoxyethoxyethoxy)methyl,                     1-hydroxyethyl, 2-hydroxyethyl, 1-aminoethyl,                     2-aminoethyl, 1-(N-isopropylamino)ethyl,                     2-(N-isopropylamino)ethyl, dimethylaminoethoxy,                     4-chlorophenoxy, phenyloxy,                     1-methylpiperdin-4-yloxy, isopropoxy, methoxy and                     ethoxy;                     wherein R³ is selected from unsubstituted or                     substituted aryl,     -   preferably substituted phenyl,     -   wherein substituted R³ is substituted with one or more         substituents independently selected from halo, —OR⁷, —SR⁷,         —SO₂R⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷,         —NR⁷C(O)R⁷, cycloalkyl, optionally substituted heterocyclyl,         optionally substituted phenyl, nitro, alkylaminoalkoxyalkoxy,         cyano, alkylaminoalkoxy, lower alkyl substituted with R¹, lower         alkenyl substituted with R¹, and lower alkynyl substituted with         R¹;         -   preferably halo, —OR⁷, —SR⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷,             —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, C₃₋₆-cycloalkyl,             optionally substituted 4-6 membered heterocyclyl, optionally             substituted phenyl, C₁₋₄-alkyl, C₁₋₄-aminoalkyl, cyano,             C₁₋₄-hydroxyalkyl, nitro and C₁₋₄-haloalkyl,             -   more preferably halo, hydroxy, C₁₋₄-alkyl, C₁₋₂-alkoxy,                 optionally substituted 4-6 membered                 heterocyclyl-C₁₋₂-alkoxy, amino, C₁₋₂-alkylamino,                 aminosulfonyl, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, C₃₋₆-cycloalkyl,                 optionally substituted 4-6 membered heterocyclyl,                 optionally substituted phenyl, nitro,                 C₁₋₂-alkylamino-C₁₋₂-alkoxy-C₁₋₂-alkoxy, cyano,                 C₁₋₂-alkylamino-C₁₋₂-alkoxy, C₁₋₂-alkylamino-C₁₋₂-alkyl,                 C₁₋₂-alkylamino-C₂₋₃-alkynyl, C₁₋₂-hydroxyalkyl,                 C₁₋₂-aminoalkyl, C₁₋₂-haloalkyl, optionally substituted                 4-6 membered heterocyclyl-C₂₋₃-alkenyl, and optionally                 substituted 4-6 membered heterocyclyl-C₂₋₃-alkynyl,                 -   even more preferably chloro, fluoro, bromo, hydroxy,                     methoxy, ethoxy, amino, dimethylamino, diethylamino,                     1-methylpiperidinylmethoxy, aminosulfonyl,                     cyclohexyl, dimethylaminopropynyl,                     dimethylaminoethoxy, 3-(4-morpholinyl)propyn-1-yl,                     dimethylaminoethoxyethoxy, optionally substituted                     piperidinyl, morpholinyl, optionally substituted                     piperazinyl, optionally substituted phenyl, methyl,                     ethyl, propyl, cyano, hydroxymethyl, aminomethyl,                     nitro and trifluoromethyl;                     wherein R⁴ is independently selected from a direct                     bond, C₂₋₄-alkylenyl, C₂₋₄-alkenylenyl and                     C₂₋₄-alkynylenyl, where one of the CH₂ groups may be                     substituted with an oxygen atom or —NH—, wherein R⁴                     is optionally substituted with hydroxy,     -   preferably a direct bond or R^(4a);         wherein R^(4a) is selected from C₂₋₄-alkylenyl where one of the         CH₂ groups may be replaced with an oxygen atom or —NH—, wherein         R^(4a) is optionally substituted with hydroxy,     -   preferably ethyl, butyl, and         wherein R⁵ is selected from H, lower alkyl, phenyl and lower         aralkyl,     -   preferably H, methyl or ethyl,         -   more preferably H;             wherein R^(5a) is selected from H, lower alkyl, phenyl and             lower aralkyl,     -   preferably H, methyl or ethyl,         -   more preferably H;             wherein R⁶ is selected from H or C₁₋₆-alkyl,     -   preferably H or C₁₋₂ alkyl;         wherein R⁷ is selected from H, lower alkyl, optionally         substituted phenyl, optionally substituted heterocyclyl,         optionally substituted C₃-C₆-cycloalkyl, optionally substituted         phenyl-C₁₋₆-alkyl, optionally substituted         heterocyclyl-C₁₋₆-alkyl, optionally substituted C₃-C₆         cycloalkyl-C₁₋₆-alkyl, lower alkylaminoalkyl, and lower         haloalkyl,     -   preferably H, C₁₋₄-alkyl, optionally substituted phenyl,         optionally substituted phenyl-C₁₋₄-alkyl, optionally substituted         4-6 membered heterocyclyl, optionally substituted 4-6 membered         heterocyclyl-C₁₋₄-alkyl, optionally substituted C₃-C₆         cycloalkyl, C₁₋₂-alkylamino-C₁₋₄-alkyl and C₁₋₂-haloalkyl,         more preferably H, methyl, phenyl, cyclopropyl, cyclohexyl,         benzyl, morpholinylmethyl, 4-methylpiperazinylmethyl,         4-methylpiperdinylmethyl, 4-morpholinylmethyl,         4-morpholinylethyl, 1-(4-morpholinyl)-2,2-dimethylpropyl,         1-piperdinylethyl, 1-piperdinylpropyl, 1-pyrrolidinylpropyl and         trifluoromethyl;         wherein R^(c) is selected from H, methyl and optionally         substituted phenyl; and         wherein R^(e) and R^(f) are independently selected from H and         C₁₋₂-haloalkyl, preferably —CF₃;         wherein R^(g) is selected from H, C₁₋₆-alkyl, optionally         substituted phenyl-C₁₋₆-alkyl, optionally substituted 4-6         membered heterocyclyl, optionally substituted 4-6 membered         heterocyclyl-C₁-C₆-alkyl, C₁₋₄-alkoxy-C₁₋₄-alkyl and         C₁₋₄-alkoxy-C₁₋₄-alkoxy-C₁₋₄-alkyl,     -   preferably H, C₁₋₃-alkyl, optionally substituted         phenyl-C₁₋₃-alkyl, optionally substituted 4-6 membered         heterocyclyl-C₁-C₃-alkyl, C₁₋₃-alkoxy-C₁₋₃-alkyl and         C₁₋₃-alkoxy-C₁₋₃-alkoxy-C₁₋₃-alkyl; and         wherein R⁹ is selected from H, optionally substituted phenyl,         optionally substituted 4-6 membered heterocyclyl and C₃-C₆         cycloalkyl;         provided R² is not 3-trifluoromethylphenyl when A is pyridyl,         when X is —C(O)NH—, when Y is —NH—CH₂—, when R¹ is H and R³ is         3-(N-methylamino-carbonyl)phenyl, 4-hydroxyphenyl,         3-hydroxyphenyl or phenyl;         further provided R² is not substituted with —SO₂NR⁷R⁷ when Y is         —NHSO₂—;         further provided R² is not 3-trifluoromethylphenyl when A is         pyridyl, when X is —C(O)NH—, when Y is —N(benzyl)-CH₂—, when R¹         is H and when R³ is phenyl;         further provided R² is not cyclohexyl when A is pyridyl, when X         is —C(O)NH—, when Y is —NH—CH₂—, when R¹ is H and when R³ is         2-methoxyphenyl or 3-methoxyphenyl;         further provided R¹ is not 2-hydroxymethylpyrrol-5-yl when A is         pyridyl;         further provided R¹ is not 4-(methoxyaminocarbonylamino)phenyl         when A is thienyl;         further provided R¹ is not 2-pyridylmethoxy when A is pyrimidyl,         when X is —C(O)NH—, and when Y is —NH—CH₂—;         further provided R¹ is not 4-methylpiperidyl when A is         pyrimidyl, when X is —C(O)NH—, when Y is —NH—CH₂—, and when R³         is 3-chloro-4-methoxyphenyl;         further provided R¹ is not bromo when A is pyrimidyl, when X is         —C(O)NH—CH₂—, when Y is —NH—CH₂—, and when R³ is         3-chloro-4-methoxyphenyl;         further provided R² is not 2-chloro-3-pyridyl when A is pyridyl;         and         further provided R² is not 2-methoxyphenyl when A is pyridyl,         when X is —C(O)NH—, when Y is —NH—CH₂—, when R¹ is H and R³ is         phenyl.

The invention also relates to compounds of Formula II′

wherein each of A³ and A⁴ is independently CH or N, provided at least one of A³ and A⁴ is N; wherein n is 1-2; wherein R¹ is one or more substituents independently selected from H, chloro, fluoro, bromo, hydroxy, methoxy, ethoxy, trifluoromethoxy, oxo, amino, dimethylamino, aminosulfonyl, carboxymethyl, cyclopropyl, optionally substituted phenyl, methyl, ethyl, propyl, cyano, hydroxymethyl, nitro, propenyl, propynyl, morpholinylethylamino, trifluoromethyl and unsubstituted or substituted heteroaryl selected from thienyl, furanyl, pyridyl, imidazolyl and pyrazolyl; wherein R² is a substituted or unsubstituted ring selected from phenyl, tetrahydronaphthyl, indanyl, benzodioxolyl, indenyl, naphthyl, isoxazolyl, pyrazolyl, thiazolyl, thiadiazolyl, thienyl, pyridyl, pyrimidinyl, pyridazinyl, 1,2-dihydroquinolyl, 1,2,3,4-tetrahydro-isoquinolyl, 1,2,3,4-tetrahydro-quinolyl, isoquinolyl, quinolyl, indolyl, isoindolyl, 2,3-dihydro-1H-indolyl, naphthyridinyl, quinozalinyl, 2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl, 5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl, indazolyl, 2,1,3-benzothiadiazolyl, 3,4-dihydro-2H-benzo[1,4]oxazinyl, benzodioxanyl, benzothienyl, benzofuryl, benzimidazolyl, benzoxazolyl and benzthiazolyl;

-   -   wherein substituted R² is substituted with one or more         substituents independently selected from bromo, chloro, fluoro,         iodo, nitro, amino, cyano, aminoethyl, Boc-aminoethyl, hydroxy,         oxo, aminosulfonyl, 4-methylpiperazinylsulfonyl, cyclohexyl,         phenyl, phenylmethyl, morpholinylmethyl,         1-methylpiperazin-4-ylmethyl, 1-methylpiperazin-4-ylpropyl,         morpholinylpropyl, piperidin-1-ylmethyl,         1-methylpiperidin-4-ylmethyl,         2-methyl-2-(1-methylpiperidin-4-yl)ethyl, morpholinylethyl,         1-(4-morpholinyl)-2,2-dimethylpropyl, piperidin-4-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-1-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-4-ylmethyl,         1-Boc-piperidin-4-ylmethyl, piperidin-4-ylpropyl,         1-Boc-piperidin-4-ylpropyl, piperidin-1-ylpropyl,         pyrrolidin-1-ylpropyl, pyrrolidin-2-ylpropyl,         1-Boc-pyrrolidin-2-ylpropyl, pyrrolidin-1-ylmethyl,         pyrrolidin-2-ylmethyl, 1-Boc-pyrrolidin-2-ylmethyl,         pyrrolidinylpropenyl, pyrrolidinylbutenyl, fluorosulfonyl,         methylsulfonyl, methylcarbonyl, Boc,         piperidin-1-ylmethylcarbonyl,         4-methylpiperazin-1-ylcarbonylethyl, methoxycarbonyl,         aminomethylcarbonyl, dimethylaminomethylcarbonyl,         3-ethoxycarbonyl-2-methyl-fur-5-yl, 4-methylpiperazin-1-yl,         4-methyl-1-piperidyl, 1-Boc-4-piperidyl, piperidin-4-yl,         1-methylpiperidin-4-yl, 1-methyl-(1,2,3,6-tetrahydropyridyl),         imidazolyl, morpholinyl, 4-trifluoromethyl-1-piperidinyl,         hydroxybutyl, methyl, ethyl, propyl, isopropyl, butyl,         tert-butyl, sec-butyl, trifluoromethyl, pentafluoroethyl,         nonafluorobutyl, dimethylaminopropyl,         1,1-di(trifluoromethyl)-1-hydroxymethyl,         1,1-di(trifluoromethyl)-1-(piperidinylethoxy)methyl,         1,1-di(trifluoromethyl)-1-(methoxyethoxyethoxy)methyl,         1-hydroxyethyl, 2-hydroxyethyl, trifluoromethoxy, 1-aminoethyl,         2-aminoethyl, 1-(N-isopropylamino)ethyl,         2-(N-isopropylamino)ethyl, dimethylaminoethoxy, 4-chlorophenoxy,         phenyloxy, azetidin-3-ylmethoxy, 1-Boc-azetidin-3-ylmethoxy,         pyrrol-2-ylmethoxy, 1-Boc-pyrrol-2-ylmethoxy,         pyrrol-1-ylmethoxy, 1-methyl-pyrrol-2-ylmethoxy,         1-isopropyl-pyrrol-2-ylmethoxy, 1-Boc-piperdin-4-ylmethoxy,         piperdin-4-ylmethoxy, 1-methylpiperdin-4-yloxy, isopropoxy,         methoxy and ethoxy; and         wherein R⁸ is one or more substituents independently selected         from H, chloro, fluoro, bromo, hydroxy, methoxy, ethoxy,         —O—CH₂—O—, trifluoromethoxy, 1-methylpiperidinylmethoxy,         dimethylaminoethoxy, amino, dimethylamino, dimethylaminopropyl,         diethylamino, aminosulfonyl, cyclohexyl, dimethylaminopropynyl,         3-(4-morpholinyl)propyn-1-yl, dimethylaminoethoxyethoxy,         3-(4-morpholinyl)propylamino, optionally substituted         piperidinyl, morpholinyl, optionally substituted piperazinyl,         optionally substituted phenyl, methyl, ethyl, propyl, cyano,         hydroxymethyl, aminomethyl, nitro and trifluoromethyl;         provided R² is not 3-trifluoromethylphenyl when A³ is N, when A⁴         is CH, when n is 1, when R¹ is H and R⁸ is 4-hydroxy, 3-hydroxy         or H; further provided R² is not 2-chloro-3-pyridyl when A³ is         N, when A⁴ is CH, when n is 1, when R¹ is H and R⁸ is H or         4-methoxy; and further provided R² is not 2-methoxyphenyl when         A³ is N, when A⁴ is CH, when n is 1, when R¹ is H and R⁸ is H.

The invention also relates to compounds of Formula III

wherein R¹ is one or more substituents independently selected from

-   -   H,     -   halo,     -   hydroxy,     -   amino,     -   C₁₋₆-alkyl,     -   C₁₋₆-haloalkyl,     -   C₁₋₆-alkoxy,     -   C₁₋₂-alkylamino,     -   aminosulfonyl,     -   C₃₋₆-cycloalkyl,     -   cyano,     -   oxo,     -   C₁₋₂-hydroxyalkyl,     -   nitro,     -   C₂₋₃-alkenyl,     -   C₂₋₃-alkynyl,     -   C₁₋₆-haloalkoxy,     -   C₁₋₆-carboxyalkyl,     -   5-6-membered heterocyclyl-C₁₋₆-alkylamino, unsubstituted or         substituted phenyl and unsubstituted or substituted 4-6 membered         heterocyclyl,     -   preferably H, chloro, fluoro, bromo, amino, hydroxy, methyl,         ethyl, propyl, oxo, dimethylamino, aminosulfonyl, cyclopropyl,         cyano, hydroxymethyl, nitro, propenyl, trifluoromethyl, methoxy,         ethoxy, trifluoromethoxy, carboxymethyl, morpholinylethylamino,         propynyl, unsubstituted or substituted phenyl and unsubstituted         or substituted heteroaryl selected from thienyl, furanyl,         pyridyl, imidazolyl, and pyrazolyl,         -   more preferably H, chloro or fluoro;             wherein R² is selected from unsubstituted or substituted             phenyl, and     -   9-10 membered bicyclic and 13-14 membered tricyclic unsaturated         or partially unsaturated heterocyclyl,     -   preferably phenyl, 1,2-dihydroquinolyl,         1,2,3,4-tetrahydro-isoquinolyl, 1,2,3,4-tetrahydro-quinolyl,         2,3-dihydro-1H-indolyl,         2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl,         5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl,         3,4-dihydro-2H-benzo[1,4]oxazinyl, and benzo[1,4]dioxanyl,         more preferably phenyl, 1,2,3,4-tetrahydro-isoquinolyl,         1,2,3,4-tetrahydro-quinolyl, 2,3-dihydro-1H-indolyl and         3,4-dihydro-2H-benzo[1,4]oxazinyl;     -   wherein substituted R² is substituted with one or more         substituents selected from halo, C₁₋₆-alkyl, optionally         substituted C₃₋₆-cycloalkyl, optionally substituted phenyl,         optionally substituted phenyl-C₁-C₄-alkylenyl, C₁₋₂-haloalkoxy,         optionally substituted phenyloxy, optionally substituted 4-6         membered heterocyclyl-C₁-C₄-alkyl, optionally substituted 4-6         membered heterocyclyl-C₂-C₄-alkenyl, optionally substituted 4-6         membered heterocyclyl, optionally substituted 4-6 membered         heterocyclyloxy, optionally substituted 4-6 membered         heterocyclyl-C₁-C₄-alkoxy, optionally substituted 4-6 membered         heterocyclylsulfonyl, optionally substituted 4-6 membered         heterocyclylamino, optionally substituted 4-6 membered         heterocyclylcarbonyl, optionally substituted 5-6 membered         heterocyclylcarbonyl-C₁₋₄-alkyl, optionally substituted 4-6         membered heterocyclyl-C₁₋₄-alkylcarbonyl, C₁₋₂-haloalkyl,         C₁₋₄-aminoalkyl, nitro, amino, hydroxy, cyano, aminosulfonyl,         C₁₋₂-alkylsulfonyl, halosulfonyl, C₁₋₄-alkylcarbonyl,         C₁₋₃-alkylamino-C₁₋₃-alkyl, C₁₋₃-alkylamino-C₁₋₃-alkoxy,         C₁₋₃-alkylamino-C₁₋₃-alkoxy-C₁₋₃-alkoxy, C₁₋₄-alkoxycarbonyl,         C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl, C₁₋₄-hydroxyalkyl,     -    and C₁₋₄-alkoxy,     -   preferably bromo, chloro, fluoro, iodo, nitro, amino, cyano,         aminoethyl, Boc-aminoethyl, hydroxy, oxo, aminosulfonyl,         4-methylpiperazinylsulfonyl, cyclohexyl, phenyl, phenylmethyl,         morpholinylmethyl, 1-methylpiperazin-4-ylmethyl,         1-methylpiperazin-4-ylpropyl, morpholinylpropyl,         piperidin-1-ylmethyl, 1-methylpiperidin-4-ylmethyl,         2-methyl-2-(1-methylpiperidin-4-yl)ethyl, morpholinylethyl,         1-(4-morpholinyl)-2,2-dimethylpropyl, piperidin-4-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-1-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-4-ylmethyl,         1-Boc-piperidin-4-ylmethyl, piperidin-4-ylpropyl,         1-Boc-piperidin-4-ylpropyl, piperidin-1-ylpropyl,         pyrrolidin-1-ylpropyl, pyrrolidin-2-ylpropyl,         1-Boc-pyrrolidin-2-ylpropyl, pyrrolidin-1-ylmethyl,         pyrrolidin-2-ylmethyl, 1-Boc-pyrrolidin-2-ylmethyl,         pyrrolidinylpropenyl, pyrrolidinylbutenyl, fluorosulfonyl,         methylsulfonyl, methylcarbonyl, Boc,         piperidin-1-ylmethylcarbonyl,         4-methylpiperazin-1-ylcarbonylethyl, methoxycarbonyl,         aminomethylcarbonyl, dimethylaminomethylcarbonyl,         3-ethoxycarbonyl-2-methyl-fur-5-yl, 4-methylpiperazin-1-yl,         4-methyl-1-piperidyl, 1-Boc-4-piperidyl, piperidin-4-yl,         1-methylpiperidin-4-yl, 1-methyl-(1,2,3,6-tetrahydropyridyl),         imidazolyl, morpholinyl, 4-trifluoromethyl-1-piperidinyl,         hydroxybutyl, methyl, ethyl, propyl, isopropyl, butyl,         tert-butyl, sec-butyl, trifluoromethyl, pentafluoroethyl,         nonafluorobutyl, dimethylaminopropyl,         1,1-di(trifluoromethyl)-1-hydroxymethyl,         1,1-di(trifluoromethyl)-1-(piperidinylethoxy)methyl,         1,1-di(trifluoromethyl)-1-(methoxyethoxyethoxy)methyl,         1-hydroxyethyl, 2-hydroxyethyl, trifluoromethoxy, 1-aminoethyl,         2-aminoethyl, 1-(N-isopropylamino)ethyl,         2-(N-isopropylamino)ethyl, dimethylaminoethoxy, 4-chlorophenoxy,         phenyloxy, azetidin-3-ylmethoxy, 1-Boc-azetidin-3-ylmethoxy,         pyrrol-2-ylmethoxy, 1-Boc-pyrrol-2-ylmethoxy,         pyrrol-1-ylmethoxy, 1-methyl-pyrrol-2-ylmethoxy,         1-isopropyl-pyrrol-2-ylmethoxy, 1-Boc-piperdin-4-ylmethoxy,         piperdin-4-ylmethoxy, 1-methylpiperdin-4-yloxy, isopropoxy,         methoxy and ethoxy,         -   more preferably bromo, chloro, fluoro, morpholinylmethyl,             1-methylpiperazin-4-ylmethyl, 1-methylpiperazin-4-ylpropyl,             morpholinylpropyl, piperidin-1-ylmethyl,             1-methylpiperidin-4-ylmethyl,             2-methyl-2-(1-methylpiperidin-4-yl)ethyl, morpholinylethyl,             1-(4-morpholinyl)-2,2-dimethylpropyl, piperidin-4-ylethyl,             1-Boc-piperidin-4-ylethyl, piperidin-1-ylethyl,             1-Boc-piperidin-4-ylethyl, piperidin-4-ylmethyl,             1-Boc-piperidin-4-ylmethyl, piperidin-4-ylpropyl,             1-Boc-piperidin-4-ylpropyl, piperidin-1-ylpropyl,             pyrrolidin-1-ylpropyl, pyrrolidin-2-ylpropyl,             1-Boc-pyrrolidin-2-ylpropyl, pyrrolidin-1-ylmethyl,             pyrrolidin-2-ylmethyl, 1-Boc-pyrrolidin-2-ylmethyl,             4-methylpiperazin-1-yl, 4-methyl-1-piperidyl,             1-Boc-4-piperidyl, piperidin-4-yl,             1-methyl-(1,2,3,6-tetrahydropyridyl),             1-methyl-piperidin-4-yl, dimethylaminomethylcarbonyl,             aminomethylcarbonyl, methylcarbonyl, methyl, ethyl, propyl,             isopropyl, butyl, tert-butyl, sec-butyl, trifluoromethyl,             pentafluoroethyl, dimethylaminopropyl, dimethylaminoethoxy,             4-chlorophenoxy, phenyloxy, azetidin-3-ylmethoxy,             1-Boc-azetidin-3-ylmethoxy, pyrrol-1-ylethoxy,             1-methyl-pyrrol-2-ylmethoxy, pyrrol-2-ylmethoxy,             1-Boc-pyrrol-2-ylmethoxy, 1-Boc-piperdin-4-ylmethoxy,             piperdin-4-ylmethoxy, and 1-methylpiperdin-4-yloxy,             -   particularly when R² is phenyl, it has a substituent                 selected from optionally substituted 4-6 membered                 heterocyclyl-C₁-C₄-alkyl, optionally substituted 4-6                 membered heterocyclyl-C₂-C₄-alkenyl, optionally                 substituted 4-6 membered heterocyclyl, optionally                 substituted 4-6 membered heterocyclyloxy, optionally                 substituted 4-6 membered heterocyclyl-C₁-C₄-alkoxy,                 optionally substituted 4-6 membered                 heterocyclylsulfonyl, optionally substituted 4-6                 membered heterocyclylamino, optionally substituted 4-6                 membered heterocyclylcarbonyl, optionally substituted                 4-6 membered heterocyclylcarbonyl-C₁₋₄-alkyl, optionally                 substituted 4-6 membered                 heterocyclyl-C₁₋₄-alkylcarbonyl;                 wherein R⁷ is selected from H, C₁₋₃-alkyl, optionally                 substituted phenyl-C₁₋₃-alkyl, 4-6 membered                 heterocyclyl, and optionally substituted 4-6 membered                 heterocyclyl-C₁-C₃-alkyl;                 wherein R^(e) and R^(f) are independently selected from                 H and C₁₋₂-haloalkyl,     -   preferably —CF₃;         wherein R^(g) is selected from H, C₁₋₃-alkyl, optionally         substituted phenyl-C₁₋₃-alkyl, 4-6 membered heterocyclyl, and         optionally substituted 4-6 membered heterocyclyl-C₁-C₃-alkyl,         C₁₋₃-alkoxy-C₁₋₂-alkyl and C₁₋₃-alkoxy-C₁₋₃-alkoxy-C₁₋₃-alkyl;         and         where R⁸ is one or more substituents selected from H, halo,         amino, hydroxy, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy,         C₁₋₆-haloalkoxy, C₁₋₆-aminoalkyl, C₁₋₆-hydroxyalkyl, optionally         substituted phenyl, optionally substituted heterocyclyl,         optionally substituted heterocyclyl-C₁₋₆-alkoxy, aminosulfonyl,         C₃₋₆-cycloalkyl, C₁₋₆-alkylamino, C₁₋₆-alkylamino-C₁₋₆-alkyl,         optionally substituted heterocyclyl-C₁₋₆-alkylamino, optionally         substituted heterocyclyl-C₁₋₆-alkyl,         C₁₋₆-alkylamino-C₂₋₄-alkynyl, C₁₋₆-alkylamino-C₁₋₆-alkoxy,         C₁₋₆-alkylamino-C₁₋₆-alkoxy-C₁₋₆-alkoxy, and optionally         substituted heterocyclyl-C₂₋₄-alkynyl,     -   preferably H, chloro, fluoro, bromo, hydroxy, methoxy, ethoxy,         —O—CH₂—O—, trifluoromethoxy, 1-methylpiperidinylmethoxy,         dimethylaminoethoxy, amino, dimethylamino, dimethylaminopropyl,         diethylamino, aminosulfonyl, cyclohexyl, dimethylaminopropynyl,         3-(4-morpholinyl)propyn-1-yl, dimethylaminoethoxyethoxy,         3-(4-morpholinyl)propylamino, optionally substituted         piperidinyl, morpholinyl, optionally substituted piperazinyl,         optionally substituted phenyl, methyl, ethyl, propyl, cyano,         hydroxymethyl, aminomethyl and trifluoromethyl,         more preferably H, chloro, fluoro, bromo, cyano, methoxy,         —O—CH₂—O—, amino, trifluoromethyl, trifluoromethoxy,         3-(4-morpholinyl)propyn-1-yl, dimethylaminopropyl, and         3-(4-morpholinyl)propylamino,         -   particularly 4-fluoro;             provided R² is not 3-trifluoromethylphenyl when R¹ is H and             R⁸ is 4-hydroxy, 3-hydroxy or H; and further provided R² is             not 2-methoxyphenyl when R¹ is H and R⁸ is H.

The invention also relates to compounds of Formula IV

wherein R² is selected from unsubstituted or substituted phenyl, and

-   -   9-10 membered bicyclic and 11-14 membered tricyclic unsaturated         or partially unsaturated heterocyclyl,     -   preferably phenyl, 1,2-dihydroquinolyl,         1,2,3,4-tetrahydro-isoquinolyl,         1′,2′-dihydro-spiro[cyclopropane-1,3′-[3H]indol]-6′-yl,         isoquinolyl, quinolyl, indolyl, isoindolyl,         2,3-dihydro-1H-indolyl, naphthyridinyl,         1,2,3,4-tetrahydro-[1,8]naphthyridinyl, quinozalinyl,         benzo[d]isothiazolyl, 3,4-dihydro-quinazolinyl,         3,4-dihydro-2H-benzo[1,4]oxazinyl,         2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl,         5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl,         tetrahydroquinolinyl, indazolyl, 2,1,3-benzothiadiazolyl,         benzodioxanyl, benzothienyl, benzofuryl, benzimidazolyl,         dihydro-benzimidazolyl, benzoxazolyl and benzthiazolyl, more         preferably 4,4-dimethyl-1,2,3,4-tetrahydro-1H-isoquinolinyl         optionally substituted with Boc,         -   4,4-dimethyl-1,2,3,4-tetrahydro-quinolyl optionally             substituted with one or more substituents selected from Boc             and oxo,         -   3,3-dimethyl-2,3-dihydro-1H-indolyl optionally substituted             with one or more substituents selected from methylsulfonyl,             1-Boc-piperidin-4-ylmethyl, piperidin-4-ylmethyl,             1-Boc-piperidin-4-yl, piperidin-4-yl,             1-methyl-piperidin-4-ylmethyl, 1-methyl-piperidin-4-yl,             pyrrolidin-1-yl-carbonyl, dimethylaminomethylcarbonyl,             aminomethylcarbonyl, methylcarbonyl, pyrrolidin-2-ylmethyl,             and 1-Boc-pyrrolidin-2-ylmethyl, and         -   3,4-dihydro-2H-benzo[1,4]oxazinyl optionally substituted             with one or more substituents selected from methyl, and             methylcarbonyl; and         -   particularly 3,3-dimethyl-2,3-dihydro-1H-indolyl optionally             substituted with a substituent selected from             pyrrolidin-1-yl-carbonyl, methylcarbonyl, and             methylsulfonyl, and         -   4,4-dimethyl-1,2,3,4-tetrahydro-1H-isoquinolinyl;     -   wherein substituted R² is substituted with one or more         substituents selected from halo, C₁₋₆-alkyl, optionally         substituted C₃₋₆-cycloalkyl, optionally substituted phenyl,         optionally substituted phenyl-C₁-C₄-alkylenyl, C₁₋₂-haloalkoxy,         optionally substituted phenyloxy, optionally substituted 4-6         membered heterocyclyl-C₁-C₆-alkyl, optionally substituted 4-6         membered heterocyclyl-C₂-C₄-alkenyl, optionally substituted 4-6         membered heterocyclyl, optionally substituted 4-6 membered         heterocyclyloxy, optionally substituted 4-6 membered         heterocyclyl-C₁₋₄-alkoxy, optionally substituted 4-6 membered         heterocyclylsulfonyl, optionally substituted 4-6 membered         heterocyclylamino, optionally substituted 4-6 membered         heterocyclylcarbonyl, optionally substituted 4-6 membered         heterocyclyl-C₁₋₄-alkylcarbonyl, optionally substituted 4-6         membered heterocyclylcarbonyl-C₁₋₄-alkyl, optionally substituted         4-6 membered heterocyclyl-C₁₋₄-alkylcarbonylamino, optionally         substituted 4-6 membered heterocyclyl-oxycarbonylamino,         C₁₋₂-haloalkyl, C₁₋₄-aminoalkyl, nitro, amino,         C₁₋₃-alkylsulfonylamino, hydroxy, cyano, aminosulfonyl,         C₁₋₂-alkylsulfonyl, halosulfonyl, C₁₋₄-alkylcarbonyl,         amino-C₁₋₄-alkylcarbonyl, C₁₋₃-alkylamino-C₁₋₄-alkylcarbonyl,         C₁₋₃-alkylamino-C₁₋₄-alkylcarbonylamino,         C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, C₁₋₃-alkylamino-C₁₋₃-alkyl,         C₁₋₃-alkylamino-C₁₋₃-alkoxy,         C₁₋₃-alkylamino-C₁₋₃-alkoxy-C₁₋₃-alkoxy, C₁₋₄-alkoxycarbonyl,         C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl,         C₁₋₃-alkylsulfonylamino-C₁₋₃-alkoxy, C₁₋₄-hydroxyalkyl,     -    C₁₋₄-alkoxy,     -   preferably bromo, chloro, fluoro, iodo, nitro, amino, cyano,         Boc-aminoethyl, hydroxy, oxo, fluorosulfonyl, methylsulfonyl,         aminosulfonyl, 4-methylpiperazinylsulfonyl, cyclohexyl, phenyl,         phenylmethyl, 4-pyridylmethyl, 4-morpholinylmethyl,         1-methylpiperazin-4-ylmethyl, 1-methylpiperazin-4-ylpropyl,         morpholinylpropyl, piperidin-1-ylmethyl,         1-methylpiperidin-4-ylmethyl,         2-methyl-2-(1-methylpiperidin-4-yl)ethyl,         2-methyl-2-(4-pyrimidinyl)ethyl,         2-methyl-2-(5-methyloxadiazol-2-yl)ethyl,         2-methyl-2-(pyrazol-5-yl)ethyl,         2-methyl-2-(1-ethoxycarbonyl-1,2,3,6-tetrahydropyridin-4-yl)ethyl,         morpholinylethyl, 1-(4-morpholinyl)-2,2-dimethylpropyl,         1-(4-morpholinyl)-2,2-dimethylethyl, piperidin-4-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-1-ylethyl,         1-Boc-piperidin-4-ylethyl, piperidin-4-ylmethyl,         1-Boc-piperidin-4-ylmethyl, piperidin-4-ylpropyl,         1-Boc-piperidin-4-ylpropyl, piperidin-1-ylpropyl,         pyrrolidin-1-ylpropyl, pyrrolidin-2-ylpropyl,         1-Boc-pyrrolidin-2-ylpropyl, 1-(pyrrolidin-1-yl)-2-methylpropyl,         pyrrolidin-1-ylmethyl, pyrrolidin-2-ylmethyl,         1-Boc-pyrrolidin-2-ylmethyl, 2-methyl-2-(pyrrolidin-1-yl)ethyl,         pyrrolidinylpropenyl, pyrrolidinylbutenyl, methylcarbonyl, Boc,         piperidin-1-ylmethylcarbonyl, pyrrolidin-1-yl-carbonyl,         pyrrolidin-2-yl-carbonyl, 4-pyridylcarbonyl,         4-methylpiperazin-1-ylcarbonylethyl, CH₃O—C(═O)—CH₂—,         methoxycarbonyl, aminomethylcarbonyl,         dimethylaminomethylcarbonyl, methylsulfonylamino,         dimethylaminomethylcarbonylamino, 1-pyrrolidinyl-CH₂—C(═O)—NH—,         4-morpholinyl-CH₂—C(═O)—NH—, 3-tetrahydrofuryl-O—C(═O)—NH—,         cyclohexyl-N(CH₃)—, (4-pyrimidinyl)amino,         (2-methylthio-4-pyrimidinyl)amino,         3-ethoxycarbonyl-2-methyl-fur-5-yl, 4-methylpiperazin-1-yl,         4-methyl-1-piperidyl, 1-Boc-4-piperidyl, piperidin-4-yl,         1-methylpiperidin-4-yl, 1-methyl-(1,2,3,6-tetrahydropyridyl),         imidazolyl, morpholinyl, 4-trifluoromethyl-1-piperidinyl,         hydroxybutyl, methyl, ethyl, propyl, isopropyl, butyl,         tert-butyl, sec-butyl, trifluoromethyl, pentafluoroethyl,         nonafluorobutyl, dimethylaminopropyl,         1,1-di(trifluoromethyl)-1-hydroxymethyl,         1,1-di(trifluoromethyl)-1-(piperidinylethoxy)methyl,         1,1-di(trifluoromethyl)-1-(pyrrolidin-2-ylmethoxy)methyl,         1,1-di(trifluoromethyl)-1-(methoxyethoxyethoxy)methyl,         1-hydroxyethyl, 2-hydroxyethyl, trifluoromethoxy, 1-aminoethyl,         2-aminoethyl, 1-(N-isopropylamino)ethyl,         2-(N-isopropylamino)ethyl, 3-tetrahydrofuryloxy,         dimethylaminoethoxy, 4-chlorophenoxy, phenyloxy,         azetidin-3-ylmethoxy, 1-Boc-azetidin-3-ylmethoxy,         3-tetrahydrofurylmethoxy, pyrrolidin-2-ylmethoxy,         1-methylcarbonyl-pyrrolidin-2-ylmethoxy,         1-Boc-pyrrolidin-2-ylmethoxy, pyrrolidin-1-ylmethoxy,         1-methyl-pyrrolidin-2-ylmethoxy,         1-isopropyl-pyrrolidin-2-ylmethoxy, 1-Boc-piperdin-4-ylmethoxy,         (1-pyrrolidinyl)ethoxy, piperdin-4-ylmethoxy,         piperdin-3-ylmethoxy, 1-methylpiperdin-4-yloxy,         methylsulfonylaminoethoxy, isopropoxy, methoxy and ethoxy,         -   more preferably bromo, chloro, fluoro, morpholinylmethyl,             1-methylpiperazin-4-ylmethyl, 1-methylpiperazin-4-ylpropyl,             morpholinylpropyl, piperidin-1-ylmethyl,             1-methylpiperidin-4-ylmethyl,             2-methyl-2-(l-methylpiperidin-4-yl)ethyl, morpholinylethyl,             1-(4-morpholinyl)-2,2-dimethylpropyl, piperidin-4-ylethyl,             1-Boc-piperidin-4-ylethyl, piperidin-1-ylethyl,             1-Boc-piperidin-4-ylethyl, piperidin-4-ylmethyl,             1-Boc-piperidin-4-ylmethyl, piperidin-4-ylpropyl,             1-Boc-piperidin-4-ylpropyl, piperidin-1-ylpropyl,             pyrrolidin-1-ylpropyl, pyrrolidin-2-ylpropyl,             1-Boc-pyrrolidin-2-ylpropyl, pyrrolidin-1-ylmethyl,             pyrrolidin-2-ylmethyl, 1-Boc-pyrrolidin-2-ylmethyl,             4-methylpiperazin-1-yl, 4-methyl-1-piperidyl,             1-Boc-4-piperidyl, piperidin-4-yl,             1-methyl-(1,2,3,6-tetrahydropyridyl),             1-methyl-piperidin-4-yl, dimethylaminomethylcarbonyl,             aminomethylcarbonyl, methylcarbonyl, methyl, ethyl, propyl,             isopropyl, butyl, tert-butyl, sec-butyl, trifluoromethyl,             pentafluoroethyl, dimethylaminopropyl, dimethylaminoethoxy,             4-chlorophenoxy, phenyloxy, azetidin-3-ylmethoxy,             1-Boc-azetidin-3-ylmethoxy, pyrrol-1-ylethoxy,             1-methyl-pyrrol-2-ylmethoxy, pyrrol-2-ylmethoxy,             1-Boc-pyrrol-2-ylmethoxy, 1-Boc-piperdin-4-ylmethoxy,             piperdin-4-ylmethoxy, and 1-methylpiperdin-4-yloxy,             -   particularly when R² is phenyl, it has a substituent                 selected from chloro, tert-butyl, azetidin-3-ylmethoxy,                 1-Boc-azetidin-3-ylmethoxy,                 dimethylaminomethylcarbonylamino,                 1,1-di(trifluoromethyl)-1-(pyrrolidin-2-ylmethoxy)methyl,                 trifluoromethyl, 2-methyl-2-(morpholin-4-yl)ethyl,                 2-methyl-2-(pyrrolidin-1-yl)ethyl,                 2-methyl-2-(5-methyloxadiazol-2-yl)ethyl,                 methylsulfonylamino, 1-methyl-pyrrolidin-2-ylmethoxy,and                 isopropyl;             -   more particularly 3-trifluorophenyl meta-substituted                 with a substituent selected from azetidin-3-ylmethoxy,                 1-Boc-azetidin-3-ylmethoxy, methylsulfonylamino and                 1-methyl-pyrrolidin-2-ylmethoxy;                 wherein R^(e) and R^(f) are independently selected from                 H and C₁₋₂-haloalkyl,     -   preferably trifluoromethyl;         wherein R^(g) is selected from H, C₁₋₃-alkyl, optionally         substituted phenyl-C₁₋₃-alkyl, 4-6 membered heterocyclyl, and         optionally substituted 4-6 membered heterocyclyl-C₁-C₃-alkyl,         C₁₋₃-alkoxy-C₁₋₂-alkyl and C₁₋₃-alkoxy-C₁₋₃-alkoxy-C₁₋₃-alkyl;         and         where R⁸ is one or more substituents selected from halo, amino,         nitro, hydroxy, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy,         C₁₋₆-haloalkoxy, C₁₋₆-aminoalkyl, C₁₋₆-hydroxyalkyl, optionally         substituted phenyl, optionally substituted heterocyclyl,         optionally substituted heterocyclyl-C₁₋₆-alkoxy, aminosulfonyl,         C₃₋₆-cycloalkyl, C₁₋₆-alkylamino, C₁₋₆-alkylamino-C₆-alkyl,         optionally substituted heterocyclyl-C₁₋₆-alkylamino, optionally         substituted heterocyclyl-C₁₋₆-alkyl,         C₁₋₆-alkylamino-C₂₋₄-alkynyl, C₁₋₆-alkylamino-C₁₋₆-alkoxy,         C₁₋₆-alkylamino-C₁₋₆-alkoxy-C₁₋₆-alkoxy, and optionally         substituted heterocyclyl-C₂₋₄-alkynyl,     -   preferably chloro, fluoro, bromo, hydroxy, methoxy, ethoxy,         —O—CH₂—O—, trifluoromethoxy, 1-methylpiperidinylmethoxy,         dimethylaminoethoxy, amino, dimethylamino, dimethylaminopropyl,         diethylamino, aminosulfonyl, cyclohexyl, dimethylaminopropynyl,         3-(4-morpholinyl)propyn-1-yl, dimethylaminoethoxyethoxy,         3-(4-morpholinyl)propylamino, optionally substituted         piperidinyl, morpholinyl, optionally substituted piperazinyl,         optionally substituted phenyl, methyl, ethyl, propyl, cyano,         hydroxymethyl, aminomethyl and trifluoromethyl,     -   more preferably fluoro, hydroxy, amino, and nitro, and         particularly 4-fluoro;     -   provided R² is not 3-trifluoromethylphenyl when R⁸ is 4-hydroxy,         or 3-hydroxy.

A family of specific compounds of particular interest within Formula I consists of compounds and pharmaceutically-acceptable derivatives thereof as follows:

-   -   2-(3-Fluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide;     -   2-(3-Fluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide,         trifluoroacetate salt;     -   N-[4-tert-Butyl-3-(pyrrolidin-2-ylmethoxy)-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide,         hydrochloride salt;     -   N-(4-Phenoxy-phenyl)-2-(3-trifluoromethyl-benzylamino)-nicotinamide;     -   2-(4-Fluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide;     -   N-(4-Phenoxy-phenyl)-2-(4-trifluoromethyl-benzylamino)-nicotinamide;     -   2-(2-Bromo-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide;     -   N-(4-Phenoxy-phenyl)-2-(4-trifluoromethoxy-benzylamino)-nicotinamide;     -   2-(2,3-Difluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide;     -   N-(4-Chlorophenyl)(2-{[(4-cyanophenyl)methyl]amino}(3-pyridyl))carboxamide;     -   N-(4-Chlorophenyl)(2-{[(2-cyanophenyl)methyl]amino}(3-pyridyl))carboxamide;     -   N-(4-sec-butylphenyl)-2-[(4-fluorobenzyl)amino]nicotinamide;     -   N-(4-tert-Butylphenyl)-2-[(4-fluorobenzyl)amino]nicotinamide;     -   N-(4-Isopropyl-phenyl)-2-(3-methoxy-benzylamino)-nicotinamide;     -   (2-{[(3-Aminophenyl)methyl]amino}(3-pyridyl))-N-[4-(methylethyl)phenyl]carboxamide;     -   (2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[4-(methylethyl)phenyl]carboxamide;     -   (2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(3,4-Dimethoxyphenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   {2-[Benzylamino](3-pyridyl)}-N-[3-(trifluoromethyl)phenyl]-carboxamide;     -   (2-{[(3-Chlorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(4-Bromophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(4-Chlorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(2,4-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(4-Fluorophenyl)ethyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(3,4-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(2,3-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(2-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(2,6-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(3-Bromophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide;     -   (2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[4-(trifluoromethyl)phenyl]carboxamide;     -   N-{3-[3-(Dimethylamino)propyl]-5-(trifluoromethyl)phenyl}(2-{[(4-fluorophenyl)methyl]amino}(3-pyridyl))carboxamide;     -   {2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl)methyl)amino](3-pyridyl)}-N-[4-(tert-butyl)phenyl]carboxamide;     -   {2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-[4-(trifluoromethyl)phenyl]carboxamide;     -   {2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-(4-bromo-2-fluorophenyl)carboxamide;     -   2-[(4-Fluorobenzyl)amino]-N-[4-tert-butyl-3-(1,2,3,6-tetrahydropyridin-4-yl)phenyl]nicotinamide;         and     -   [2-({[4-Fluoro-3-(3-morpholin-4-ylprop-1-ynyl)phenyl]methyl}amino)(3-pyridyl)]-N-[3-(trifluoromethyl)phenyl]carboxamide.

Another family of specific compounds of particular interest within Formula I consists of compounds and pharmaceutically-acceptable derivatives thereof as follows:

-   -   N-(3,3-Dimethyl-1-(methylsulfonyl)-2,3-dihydro-1H-indol-6-yl)-2-(((4-fluorophenyl)methyl)amino)-3-pyridinecarboxamide;     -   N-(4-(1,1-dimethylethyl)-3-((N,N-dimethylglycyl)amino)phenyl)-2-(((4-fluorophenyl)methyl)amino)-3-pyridinecarboxamide;     -   N-(3-((((2R)-1-methyl-2-pyrrolidinyl)methyl)oxy)-5-(trifluoromethyl)phenyl)-2-((3-(1,3-oxazol-5-yl)phenyl)amino)-3-pyridinecarboxamide;     -   2-(((4-fluorophenyl)methyl)amino)-N-(3-((((2R)-1-methyl-2-pyrrolidinyl)methyl)oxy)-5-(trifluoromethyl)phenyl)-3-pyridinecarboxamide;     -   2-(((4-fluorophenyl)methyl)amino)-N-(3-((methylsulfonyl)amino)-5-(trifluoromethyl)phenyl)-3-pyridinecarboxamide;     -   2-((3-(1,3-oxazol-5-yl)phenyl)amino)-N-(3-(trifluoromethyl)phenyl)-3-pyridinecarboxamide;     -   2-(((4-fluorophenyl)methyl)amino)-N-(4-(1-methyl-1-(5-methyl-1,3,4-oxadiazol-2-yl)ethyl)phenyl)-3-pyridinecarboxamide;     -   3-(2-Chloro-5-{[2-(4-fluoro-benzylamino)-pyridine-3-carbonyl]-amino}-phenoxymethyl)-azetidine-1-carboxylic         acid tert-butyl ester;     -   N-[3-(Azetidin-3-ylmethoxy)-4-chloro-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide;     -   6-Chloro-3-(4-fluoro-benzylamino)-pyridazine-4-carboxylic acid         (4-tert-butyl-phenyl)-amide;     -   3-(4-Fluoro-benzylamino)-pyridazine-4-carboxylic acid         (4-tert-butyl-phenyl)-amide;     -   2-(4-Hydroxy-3-amino-benzylamino)-N-(4-isopropyl-phenyl)-nicotinamide;     -   2-(4-Hydroxy-3-nitro-benzylamino)-N-(4-isopropyl-phenyl)-nicotinamide;     -   3-(4-Fluoro-benzylamino)-1,2,5,6-tetrahydro-pyridazine-4-carboxylic         acid (4-tert-butyl-phenyl)-amide; and     -   N-[3-(Azetidin-3-ylmethoxy)-5-trifluoromethyl-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide.         Indications

Compounds of the present invention would be useful for, but not limited to, the prevention or treatment of angiogenesis-related diseases. The compounds of the invention have kinase inhibitory activity, such as VEGFR/KDR inhibitory activity. The compounds of the invention are useful in therapy as antineoplasia agents or to minimize deleterious effects of VEGF.

Compounds of the invention would be useful for the treatment of neoplasia including cancer and metastasis, including, but not limited to: carcinoma such as cancer of the bladder, breast, colon, kidney, liver, lung (including small cell lung cancer), esophagus, gall-bladder, ovary, pancreas, stomach, cervix, thyroid, prostate, and skin (including squamous cell carcinoma); hematopoietic tumors of lymphoid lineage (including leukemia, acute lymphocitic leukemia, acute lymphoblastic leukemia, B-cell lymphoma, T-cell-lymphoma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, hairy cell lymphoma and Burkett's lymphoma); hematopoietic tumors of myeloid lineage (including acute and chronic myelogenous leukemias, myelodysplastic syndrome and promyelocytic leukemia); tumors of mesenchymal origin (including fibrosarcoma and rhabdomyosarcoma, and other sarcomas, e.g. soft tissue and bone); tumors of the central and peripheral nervous system (including astrocytoma, neuroblastoma, glioma and schwannomas); and other tumors (including melanoma, seminoma, teratocarcinoma, osteosarcoma, xenoderoma pigmentosum, keratoctanthoma, thyroid follicular cancer and Kaposi's sarcoma).

Preferably, the compounds are useful for the treatment of neoplasia selected from lung cancer, colon cancer and breast cancer.

The compounds also would be useful for treatment of ophthalmological conditions such as corneal graft rejection, ocular neovascularization, retinal neovascularization including neovascularization following injury or infection, diabetic retinopathy, retrolental fibroplasia and neovascular glaucoma; retinal ischemia; vitreous hemorrhage; ulcerative diseases such as gastric ulcer; pathological, but non-malignant, conditions such as hemangiomas, including infantile hemaginomas, angiofibroma of the nasopharynx and avascular necrosis of bone; and disorders of the female reproductive system such as endometriosis. The compounds are also useful for the treatment of edema, and conditions of vascular hyperpermeability.

The compounds of the invention are useful in therapy of proliferative diseases. These compounds can be used for the treatment of an inflammatory rheumatoid or rheumatic disease, especially of manifestations at the locomotor apparatus, such as various inflammatory rheumatoid diseases, especially chronic polyarthritis including rheumatoid arthritis, juvenile arthritis or psoriasis arthropathy; paraneoplastic syndrome or tumor-induced inflammatory diseases, turbid effusions, collagenosis, such as systemic Lupus erythematosus, poly-myositis, dermato-myositis, systemic sclerodermia or mixed collagenosis; postinfectious arthritis (where no living pathogenic organism can be found at or in the affected part of the body), seronegative spondylarthritis, such as spondylitis ankylosans; vasculitis, sarcoidosis, or arthrosis; or further any combinations thereof. An example of an inflammation related disorder is (a) synovial inflammation, for example, synovitis, including any of the particular forms of synovitis, in particular bursal synovitis and purulent synovitis, as far as it is not crystal-induced. Such synovial inflammation may for example, be consequential to or associated with disease, e.g. arthritis, e.g. osteoarthritis, rheumatoid arthritis or arthritis deformans. The present invention is further applicable to the systemic treatment of inflammation, e.g. inflammatory diseases or conditions, of the joints or locomotor apparatus in the region of the tendon insertions and tendon sheaths. Such inflammation may be, for example, be consequential to or associated with disease or further (in a broader sense of the invention) with surgical intervention, including, in particular conditions such as insertion endopathy, myofasciale syndrome and tendomyosis. The present invention is further especially applicable to the treatment of inflammation, e.g. inflammatory disease or condition, of connective tissues including dermatomyositis and myositis.

These compounds can be used as active agents against such disease states as arthritis, atherosclerosis, psoriasis, hemangiomas, myocardial angiogenesis, coronary and cerebral collaterals, ischemic limb angiogenesis, wound healing, peptic ulcer Helicobacter related diseases, fractures, cat scratch fever, rubeosis, neovascular glaucoma and retinopathies such as those associated with diabetic retinopathy or macular degeneration. In addition, some of these compounds can be used as active agents against solid tumors, malignant ascites, hematopoietic cancers and hyperproliferative disorders such as thyroid hyperplasia (especially Grave's disease), and cysts (such as hypervascularity of ovarian stroma, characteristic of polycystic ovarian syndrome (Stein-Leventhal syndrome)) since such diseases require a proliferation of blood vessel cells for growth and/or metastasis.

Further, some of these compounds can be used as active agents against burns, chronic lung disease, stroke, polyps, anaphylaxis, chronic and allergic inflammation, ovarian hyperstimulation syndrome, brain tumor-associated cerebral edema, high-altitude, trauma or hypoxia induced cerebral or pulmonary edema, ocular and macular edema, ascites, and other diseases where vascular hyperpermeability, effusions, exudates, protein extravasation, or edema is a manifestation of the disease. The compounds will also be useful in treating disorders in which protein extravasation leads to the deposition of fibrin and extracellular matrix, promoting stromal proliferation (e.g. fibrosis, cirrhosis and carpal tunnel syndrome).

The compounds of the present invention are also useful in the treatment of ulcers including bacterial, fungal, Mooren ulcers and ulcerative colitis.

The compounds of the present invention are also useful in the treatment of conditions wherein undesired angiogenesis, edema, or stromal deposition occurs in viral infections such as Herpes simplex, Herpes Zoster, AIDS, Kaposi's sarcoma, protozoan infections and toxoplasmosis, following trauma, radiation, stroke, endometriosis, ovarian hyperstimulation syndrome, systemic lupus, sarcoidosis, synovitis, Crohn's disease, sickle cell anaemia, Lyme disease, pemphigoid, Paget's disease, hyperviscosity syndrome, Osler-Weber-Rendu disease, chronic inflammation, chronic occlusive pulmonary disease, asthma, and inflammatory rheumatoid or rheumatic disease. The compounds are also useful in the reduction of sub-cutaneous fat and for the treatment of obesity.

The compounds of the present invention are also useful in the treatment of ocular conditions such as ocular and macular edema, glaucoma, ocular neovascular disease, scleritis, radial keratotomy, uveitis, vitritis, myopia, optic pits, chronic retinal detachment, post-laser complications, conjunctivitis, Stargardt's disease and Eales disease in addition to retinopathy and macular degeneration.

The compounds of the present invention are also useful in the treatment of cardiovascular conditions such as atherosclerosis, restenosis, arteriosclerosis, vascular occlusion and carotid obstructive disease.

The compounds of the present invention are also useful in the treatment of cancer related indications such as solid tumors, sarcomas (especially Ewing's sarcoma and osteosarcoma), retinoblastoma, rhabdomyosarcomas, neuroblastoma, hematopoietic malignancies, including leukemia and lymphoma, tumor-induced pleural or pericardial effusions, and malignant ascites.

The compounds of the present invention are also useful in the treatment of diabetic conditions such as diabetic retinopathy and microangiopathy.

The compounds of this invention may also act as inhibitors of other protein kinases, e.g. p38, EGFR, CDK-2, CDK-5, IKK, JNK3, bFGFR, PDGFR and RAF and thus be effective in the treatment of diseases associated with other protein kinases.

Besides being useful for human treatment, these compounds are also useful for veterinary treatment of companion animals, exotic animals and farm animals, including mammals, rodents, and the like. More preferred animals include horses, dogs, and cats.

As used herein, the compounds of the present invention include the pharmaceutically acceptable derivatives thereof.

Definitions

A “pharmaceutically-acceptable derivative” denotes any salt, ester of a compound of this invention, or any other compound which upon administration to a patient is capable of providing (directly or indirectly) a compound of this invention, or a metabolite or residue thereof, characterized by the ability to inhibit angiogenesis.

The term “treatment” includes therapeutic treatment as well as prophylactic treatment (either preventing the onset of disorders altogether or delaying the onset of a preclinically evident stage of disorders in individuals).

The phrase “therapeutically-effective” is intended to qualify the amount of each agent, which will achieve the goal of improvement in disorder severity and the frequency of incidence over treatment of each agent by itself, while avoiding adverse side effects typically associated with alternative therapies. For example, effective neoplastic therapeutic agents prolong the survivability of the patient, inhibit the rapidly-proliferating cell growth associated with the neoplasm, or effect a regression of the neoplasm.

The term “prevention” includes either preventing the onset of disorders altogether or delaying the onset of a preclinically evident stage of disorders in individuals. This includes prophylactic treatment of those at risk of developing a disease, such as a cancer, for example. “Prophylaxis” is another term for prevention.

The term “H” denotes a single hydrogen atom. This radical may be attached, for example, to an oxygen atom to form a hydroxyl radical.

Where the term “alkyl” is used, either alone or within other terms such as “haloalkyl” and “alkylamino”, it embraces linear or branched radicals having one to about twelve carbon atoms. More preferred alkyl radicals are “lower alkyl” radicals having one to about six carbon atoms. Examples of such radicals include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isoamyl, hexyl and the like. Even more preferred are lower alkyl radicals having one or two carbon atoms. The term “alkylenyl” embraces bridging divalent alkyl radicals such as methylenyl and ethylenyl. The term “lower alkyl substituted with R¹” does not include an acetal moiety.

The term “alkenyl” embraces linear or branched radicals having at least one carbon-carbon double bond of two to about twelve carbon atoms. More preferred alkenyl radicals are “lower alkenyl” radicals having two to about six carbon atoms. Most preferred lower alkenyl radicals are radicals having two to about four carbon atoms. Examples of alkenyl radicals include ethenyl, propenyl, allyl, propenyl, butenyl and 4-methylbutenyl. The terms “alkenyl” and “lower alkenyl”, embrace radicals having “cis” and “trans” orientations, or alternatively, “E” and “Z” orientations.

The term “alkynyl” denotes linear or branched radicals having at least one carbon-carbon triple bond and having two to about twelve carbon atoms. More preferred alkynyl radicals are “lower alkynyl” radicals having two to about six carbon atoms. Most preferred are lower alkynyl radicals having two to about four carbon atoms. Examples of such radicals include propargyl, butynyl, and the like.

The term “halo” means halogens such as fluorine, chlorine, bromine or iodine atoms.

The term “haloalkyl” embraces radicals wherein any one or more of the alkyl carbon atoms is substituted with halo as defined above. Specifically embraced are monohaloalkyl, dihaloalkyl and polyhaloalkyl radicals including perhaloalkyl. A monohaloalkyl radical, for one example, may have either an iodo, bromo, chloro or fluoro atom within the radical. Dihalo and polyhaloalkyl radicals may have two or more of the same halo atoms or a combination of different halo radicals. “Lower haloalkyl” embraces radicals having 1-6 carbon atoms. Even more preferred are lower haloalkyl radicals having one to three carbon atoms. Examples of haloalkyl radicals include fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, pentafluoroethyl, heptafluoropropyl, difluorochloromethyl, dichlorofluoromethyl, difluoroethyl, difluoropropyl, dichloroethyl and dichloropropyl. “Perfluoroalkyl” means alkyl radicals having all hydrogen atoms replaced with fluoro atoms. Examples include trifluoromethyl and pentafluoroethyl.

The term “hydroxyalkyl” embraces linear or branched alkyl radicals having one to about ten carbon atoms any one of which may be substituted with one or more hydroxyl radicals. More preferred hydroxyalkyl radicals are “lower hydroxyalkyl” radicals having one to six carbon atoms and one or more hydroxyl radicals. Examples of such radicals include hydroxymethyl, hydroxyethyl, hydroxypropyl, hydroxybutyl and hydroxyhexyl. Even more preferred are lower hydroxyalkyl radicals having one to three carbon atoms.

The term “alkoxy” embrace linear or branched oxy-containing radicals each having alkyl portions of one to about ten carbon atoms. More preferred alkoxy radicals are “lower alkoxy” radicals having one to six carbon atoms. Examples of such radicals include methoxy, ethoxy, propoxy, butoxy and tert-butoxy. Even more preferred are lower alkoxy radicals having one to three carbon atoms. Alkoxy radicals may be further substituted with one or more halo atoms, such as fluoro, chloro or bromo, to provide “haloalkoxy” radicals. Even more preferred are lower haloalkoxy radicals having one to three carbon atoms. Examples of such radicals include fluoromethoxy, chloromethoxy, trifluoromethoxy, trifluoroethoxy, fluoroethoxy and fluoropropoxy.

The term “aryl”, alone or in combination, means a carbocyclic aromatic system containing one or two rings wherein such rings may be attached together in a fused manner. The term “aryl” embraces aromatic radicals such as phenyl, naphthyl, indenyl, tetrahydronaphthyl, and indanyl. More preferred aryl is phenyl. Said “aryl” group may have 1 to 3 substituents such as lower alkyl, hydroxyl, halo, haloalkyl, nitro, cyano, alkoxy and lower alkylamino. Phenyl substituted with —O—CH₂—O— forms the aryl benzodioxolyl substituent.

The term “heterocyclyl” embraces saturated, partially saturated and unsaturated heteroatom-containing ring radicals, where the heteroatoms may be selected from nitrogen, sulfur and oxygen. It does not include rings containing —O—O—, —O—S— or —S—S— portions. Said “heterocyclyl” group may have 1 to 3 substituents such as hydroxyl, Boc, halo, haloalkyl, cyano, lower alkyl, lower aralkyl, oxo, lower alkoxy, amino and lower alkylamino.

Examples of saturated heterocyclic radicals include saturated 3 to 6-membered heteromonocyclic groups containing 1 to 4 nitrogen atoms [e.g. pyrrolidinyl, imidazolidinyl, piperidinyl, pyrrolinyl, piperazinyl]; saturated 3 to 6-membered heteromonocyclic group containing 1 to 2 oxygen atoms and 1 to 3 nitrogen atoms [e.g. morpholinyl]; saturated 3 to 6-membered heteromonocyclic group containing 1 to 2 sulfur atoms and 1 to 3 nitrogen atoms [e.g., thiazolidinyl]. Examples of partially saturated heterocyclyl radicals include dihydrothienyl, dihydropyranyl, dihydrofuryl and dihydrothiazolyl.

Examples of unsaturated heterocyclic radicals, also termed “heteroaryl” radicals, include unsaturated 5 to 6 membered heteromonocyclyl group containing 1 to 4 nitrogen atoms, for example, pyrrolyl, imidazolyl, pyrazolyl, 2-pyridyl, 3-pyridyl, 4-pyridyl, pyrimidyl, pyrazinyl, pyridazinyl, triazolyl [e.g., 4H-1,2,4-triazolyl, 1H-1,2,3-triazolyl, 2H-1,2,3-triazolyl]; unsaturated 5- to 6-membered heteromonocyclic group containing an oxygen atom, for example, pyranyl, 2-furyl, 3-furyl, etc.; unsaturated 5 to 6-membered heteromonocyclic group containing a sulfur atom, for example, 2-thienyl, 3-thienyl, etc.; unsaturated 5- to 6-membered heteromonocyclic group containing 1 to 2 oxygen atoms and 1 to 3 nitrogen atoms, for example, oxazolyl, isoxazolyl, oxadiazolyl [e.g., 1,2,4-oxadiazolyl, 1,3,4-oxadiazolyl, 1,2,5-oxadiazolyl]; unsaturated 5 to 6-membered heteromonocyclic group containing 1 to 2 sulfur atoms and 1 to 3 nitrogen atoms, for example, thiazolyl, thiadiazolyl [e.g., 1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,5-thiadiazolyl].

The term also embraces radicals where heterocyclic radicals are fused/condensed with aryl radicals: unsaturated condensed heterocyclic group containing 1 to 5 nitrogen atoms, for example, indolyl, isoindolyl, indolizinyl, benzimidazolyl, quinolyl, isoquinolyl, indazolyl, benzotriazolyl, tetrazolopyridazinyl [e.g., tetrazolo [1,5-b]pyridazinyl]; unsaturated condensed heterocyclic group containing 1 to 2 oxygen atoms and 1 to 3 nitrogen atoms [e.g. benzoxazolyl, benzoxadiazolyl]; unsaturated condensed heterocyclic group containing 1 to 2 sulfur atoms and 1 to 3 nitrogen atoms [e.g., benzothiazolyl, benzothiadiazolyl]; and saturated, partially unsaturated and unsaturated condensed heterocyclic group containing 1 to 2 oxygen or sulfur atoms [e.g. benzofuryl, benzothienyl, 2,3-dihydro-benzo[1,4]dioxinyl and dihydrobenzofuryl]. Preferred heterocyclic radicals include five to ten membered fused or unfused radicals. More preferred examples of heteroaryl radicals include quinolyl, isoquinolyl, imidazolyl, pyridyl, thienyl, thiazolyl, oxazolyl, furyl, and pyrazinyl. Other preferred heteroaryl radicals are 5- or 6-membered heteroaryl, containing one or two heteroatoms selected from sulfur, nitrogen and oxygen, selected from thienyl, furyl, pyrrolyl, indazolyl, pyrazolyl, oxazolyl, triazolyl, imidazolyl, pyrazolyl, isoxazolyl, isothiazolyl, pyridyl, piperidinyl and pyrazinyl.

Particular examples of non-nitrogen containing heteroaryl include pyranyl, 2-furyl, 3-furyl, 2-thienyl, 3-thienyl, benzofuryl, benzothienyl, and the like.

Particular examples of partially saturated and saturated heterocyclyl include pyrrolidinyl, imidazolidinyl, piperidinyl, pyrrolinyl, pyrazolidinyl, piperazinyl, morpholinyl, tetrahydropyranyl, thiazolidinyl, dihydrothienyl, 2,3-dihydro-benzo[1,4]dioxanyl, indolinyl, isoindolinyl, dihydrobenzothienyl, dihydrobenzofuryl, isochromanyl, chromanyl, 1,2-dihydroquinolyl, 1,2,3,4-tetrahydro-isoquinolyl, 1,2,3,4-tetrahydro-quinolyl, 2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluorenyl, 5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinolyl, 3,4-dihydro-2H-benzo[1,4]oxazinyl, benzo[1,4]dioxanyl, 2,3-dihydro-1H-1λ′-benzo[d]isothiazol-6-yl, dihydropyranyl, dihydrofuryl and dihydrothiazolyl, and the like.

The term “sulfonyl”, whether used alone or linked to other terms such as alkylsulfonyl, denotes respectively divalent radicals —SO₂—.

The terms “sulfamyl,” “aminosulfonyl” and “sulfonamidyl,” denotes a sulfonyl radical substituted with an amine radical, forming a sulfonamide (—SO₂NH₂).

The term “alkylaminosulfonyl” includes “N-alkylaminosulfonyl” where sulfamyl radicals are independently substituted with one or two alkyl radical(s). More preferred alkylaminosulfonyl radicals are “lower alkylaminosulfonyl” radicals having one to six carbon atoms. Even more preferred are lower alkylaminosulfonyl radicals having one to three carbon atoms. Examples of such lower alkylaminosulfonyl radicals include N-methylaminosulfonyl, and N-ethylaminosulfonyl.

The terms “carboxy” or “carboxyl”, whether used alone or with other terms, such as “carboxyalkyl”, denotes —CO₂H.

The term “carbonyl”, whether used alone or with other terms, such as “aminocarbonyl”, denotes —(C═O)—.

The term “aminocarbonyl” denotes an amide group of the formula —C(═O)NH₂.

The terms “N-alkylaminocarbonyl” and “N,N-dialkylaminocarbonyl” denote aminocarbonyl radicals independently substituted with one or two alkyl radicals, respectively. More preferred are “lower alkylaminocarbonyl” having lower alkyl radicals as described above attached to an aminocarbonyl radical.

The terms “N-arylaminocarbonyl” and “N-alkyl-N-arylaminocarbonyl” denote aminocarbonyl radicals substituted, respectively, with one aryl radical, or one alkyl and one aryl radical.

The term “heterocyclylcarbonylalkyl” denotes alkyl groups which have been substituted with a heterocyclylcarbonyl radical. More preferred are contain 4-6 membered heterocyclyl groups and C₁-C₆-alkyl radicals, such as 4-methylpiperazinylcarbonylethyl.

The term “heterocyclylalkylcarbonyl” denotes carbonyl groups which have been substituted with a heterocyclylalkyl radical. More preferred are contain 4-6 membered heterocyclyl groups and C₁-C₆-alkyl radicals, such as piperidinylmethylcarbonyl.

The term “alkoxycarbonylaminoalkyl” denotes an aminoalkyl group, which is substituted with an alkoxycarbonyl radical. More preferred are “lower alkoxycarbonylaminoalkyl” having C₁-C₆-alkyl radicals.

The term “heterocyclylalkylenyl” embraces heterocyclic-substituted alkyl radicals. More preferred heterocyclylalkylenyl radicals are “5- or 6-membered heteroarylalkylenyl” radicals having alkyl portions of one to six carbon atoms and a 5- or 6-membered heteroaryl radical. Even more preferred are lower heteroarylalkylenyl radicals having alkyl portions of one to four carbon atoms. Examples include such radicals as pyridylmethyl and thienylmethyl.

The term “aralkyl” embraces aryl-substituted alkyl radicals. Preferable aralkyl radicals are “lower aralkyl” radicals having aryl radicals attached to alkyl radicals having one to six carbon atoms. Even more preferred are “phenylalkylenyl” attached to alkyl portions having one to three carbon atoms. Examples of such radicals include benzyl, diphenylmethyl and phenylethyl. The aryl in said aralkyl may be additionally substituted with halo, alkyl, alkoxy, halkoalkyl and haloalkoxy.

The term “alkylthio” embraces radicals containing a linear or branched alkyl radical, of one to ten carbon atoms, attached to a divalent sulfur atom. Even more preferred are lower alkylthio radicals having one to three carbon atoms. An example of “alkylthio” is methylthio, (CH₃S—).

The term “haloalkylthio” embraces radicals containing a haloalkyl radical, of one to ten carbon atoms, attached to a divalent sulfur atom. Even more preferred are lower haloalkylthio radicals having one to three carbon atoms. An example of “haloalkylthio” is trifluoromethylthio.

The term “alkylamino” embraces “N-alkylamino” and “N,N-dialkylamino” where amino groups are independently substituted with one alkyl radical and with two alkyl radicals, respectively. More preferred alkylamino radicals are “lower alkylamino” radicals having one or two alkyl radicals of one to six carbon atoms, attached to a nitrogen atom. Even more preferred are lower alkylamino radicals having one to three carbon atoms. Suitable alkylamino radicals may be mono or dialkylamino such as N-methylamino, N-ethylamino, N,N-dimethylamino, N,N-diethylamino and the like.

The term “arylamino” denotes amino groups which have been substituted with one or two aryl radicals, such as N-phenylamino. The arylamino radicals may be further substituted on the aryl ring portion of the radical.

The term “heteroarylamino” denotes amino groups which have been substituted with one or two heteroaryl radicals, such as N-thienylamino. The “heteroarylamino” radicals may be further substituted on the heteroaryl ring portion of the radical.

The term “aralkylamino” denotes amino groups which have been independently substituted with one or two aralkyl radicals. More preferred are phenyl-C₁-C₃-alkylamino radicals, such as N-benzylamino. The aralkylamino radicals may be further substituted on the aryl ring portion.

The terms “N-alkyl-N-arylamino” and “N-aralkyl-N-alkylamino” denote amino groups which are independently substituted with one aralkyl and one alkyl radical, or one aryl and one alkyl radical, respectively, to an amino group.

The term “aminoalkyl” embraces linear or branched alkyl radicals having one to about ten carbon atoms any one of which may be substituted with one or more amino radicals. More preferred aminoalkyl radicals are “lower aminoalkyl” radicals having one to six carbon atoms and one or more amino radicals. Examples of such radicals include aminomethyl, aminoethyl, aminopropyl, aminobutyl and aminohexyl. Even more preferred are lower aminoalkyl radicals having one to three carbon atoms.

The term “alkylaminoalkyl” embraces alkyl radicals substituted with alkylamino radicals. More preferred alkylaminoalkyl radicals are “lower alkylaminoalkyl” radicals having alkyl radicals of one to six carbon atoms. Even more preferred are lower alkylaminoalkyl radicals having alkyl radicals of one to three carbon atoms. Suitable alkylaminoalkyl radicals may be mono or dialkyl substituted, such as N-methylaminomethyl, N,N-dimethyl-aminoethyl, N,N-diethylaminomethyl and the like.

The term “alkylaminoalkoxy” embraces alkoxy radicals substituted with alkylamino radicals. More preferred alkylaminoalkoxy radicals are “lower alkylaminoalkoxy” radicals having alkoxy radicals of one to six carbon atoms. Even more preferred are lower alkylaminoalkoxy radicals having alkyl radicals of one to three carbon atoms. Suitable alkylaminoalkoxy radicals may be mono or dialkyl substituted, such as N-methylaminoethoxy, N,N-dimethylaminoethoxy, N,N-diethylaminoethoxy and the like.

The term “alkylaminoalkoxyalkoxy” embraces alkoxy radicals substituted with alkylaminoalkoxy radicals. More preferred alkylaminoalkoxyalkoxy radicals are “lower alkylaminoalkoxyalkoxy” radicals having alkoxy radicals of one to six carbon atoms. Even more preferred are lower alkylaminoalkoxyalkoxy radicals having alkyl radicals of one to three carbon atoms. Suitable alkylaminoalkoxyalkoxy radicals may be mono or dialkyl substituted, such as N-methylaminoethoxyethoxy, N-methylaminomethoxyethoxy, N,N-dimethylaminoethoxyethoxy, N,N-diethylaminomethoxymethoxy and the like.

The term “carboxyalkyl” embraces linear or branched alkyl radicals having one to about ten carbon atoms any one of which may be substituted with one or more carboxy radicals. More preferred carboxyalkyl radicals are “lower carboxyalkyl” radicals having one to six carbon atoms and one carboxy radical. Examples of such radicals include carboxymethyl, carboxypropyl, and the like. Even more preferred are lower carboxyalkyl radicals having one to three CH₂ groups.

The term “halosulfonyl” embraces sulfonyl radicals substituted with a halogen radical. Examples of such halosulfonyl radicals include chlorosulfonyl and fluorosulfonyl.

The term “arylthio” embraces aryl radicals of six to ten carbon atoms, attached to a divalent sulfur atom. An example of “arylthio” is phenylthio.

The term “aralkylthio” embraces aralkyl radicals as described above, attached to a divalent sulfur atom. More preferred are phenyl-C₁-C₃-alkylthio radicals. An example of “aralkylthio” is benzylthio.

The term “aryloxy” embraces optionally substituted aryl radicals, as defined above, attached to an oxygen atom. Examples of such radicals include phenoxy.

The term “aralkoxy” embraces oxy-containing aralkyl radicals attached through an oxygen atom to other radicals. More preferred aralkoxy radicals are “lower aralkoxy” radicals having optionally substituted phenyl radicals attached to lower alkoxy radical as described above.

The term “heteroaryloxy” embraces optionally substituted heteroaryl radicals, as defined above, attached to an oxygen atom.

The term “heteroarylalkoxy” embraces oxy-containing heteroarylalkyl radicals attached through an oxygen atom to other radicals. More preferred heteroarylalkoxy radicals are “lower heteroarylalkoxy” radicals having optionally substituted heteroaryl radicals attached to lower alkoxy radical as described above.

The term “cycloalkyl” includes saturated carbocyclic groups. Preferred cycloalkyl groups include C₃-C₆ rings. More preferred compounds include, cyclopentyl, cyclopropyl, and cyclohexyl.

The term “cycloalkylalkyl” embraces cycloalkyl-substituted alkyl radicals. Preferable cycloalkylalkyl radicals are “lower cycloalkylalkyl” radicals having C₃₋₆ cycloalkyl radicals attached to alkyl radicals having one to six carbon atoms.

The term “cycloalkenyl” includes carbocyclic groups having one or more carbon-carbon double bonds including “cycloalkyldienyl” compounds. Preferred cycloalkenyl groups include C₃-C₆ rings. More preferred compounds include, for example, cyclopentenyl, cyclopentadienyl, cyclohexenyl and cycloheptadienyl.

The term “comprising” is meant to be open ended, including the indicated component but not excluding other elements.

The term “Formulas I-IV” includes formula II′.

The compounds of the invention are endowed with kinase inhibitory activity, such as KDR inhibitory activity.

The present invention also comprises the use of a compound of the invention, or pharmaceutically acceptable salt thereof, in the manufacture of a medicament for the treatment either acutely or chronically of an angiogenesis mediated disease state, including those described previously. The compounds of the present invention are useful in the manufacture of an anti-cancer medicament. The compounds of the present invention are also useful in the manufacture of a medicament to attenuate or prevent disorders through inhibition of KDR.

The present invention comprises a pharmaceutical composition comprising a therapeutically-effective amount of a compound of Formulas I-IV in association with a least one pharmaceutically-acceptable carrier, adjuvant or diluent.

The present invention also comprises a method of treating angiogenesis related disorders in a subject having or susceptible to such disorder, the method comprising treating the subject with a therapeutically-effective amount of a compound of Formula I

wherein each of A¹ and A² is independently C or N;

-   -   wherein A¹-A² form part of a ring A selected from 5- or         6-membered heteroaryl;     -   wherein X is         wherein Z is oxygen or sulfur;     -   Y is selected from         wherein p is 0 to 2,     -   wherein R^(a) and R^(b) are independently selected from H, halo,         cyano, —NHR⁶ and C₁₋₄-alkyl substituted with R¹, or wherein         R^(a) and R^(b) together form C₃-C₆ cycloalkyl;     -   wherein R^(z) is selected from C₂-C₆-alkylenyl, where one of the         CH₂ groups may be replaced with an oxygen atom or an —NH—;         wherein one of the CH₂ groups may be substituted with one or two         radicals selected from halo, cyano, —NHR⁶ and C₁₋₄-alkyl         substituted with R¹;     -   wherein R^(d) is cycloalkyl;     -   wherein R¹ is one or more substituents independently selected         from H, halo, —OR⁷, oxo, —SR⁷, —CO₂R⁷, —COR⁷, —CONR⁷R⁷, —NR⁷R⁷,         —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, —NR⁷C(O)NR⁷R⁷, cycloalkyl,         optionally substituted phenylalkylenyl, optionally substituted         5-6 membered heterocyclyl, optionally substituted         heteroarylalkylenyl, optionally substituted phenyl, lower alkyl,         cyano, lower hydroxyalkyl, lower carboxyalkyl, nitro, lower         alkenyl, lower alkynyl, lower aminoalkyl, lower alkylaminoalkyl         and lower haloalkyl;     -   wherein R² is selected from     -   a) substituted or unsubstituted 6-10 membered aryl,     -   b) substituted or unsubstituted 5-6 membered heterocyclyl,     -   c) substituted or unsubstituted 9-14 membered bicyclic or         tricyclic heterocyclyl,     -   d) cycloalkyl, and     -   e) cycloalkenyl,     -   wherein substituted R² is substituted with one or more         substituents independently selected from halo, —OR , —SR⁷,         —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —NH(C₁-C₄ alkylenylR⁹), —SO₂R⁷,         —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷, —NR⁷C(O)R⁷, optionally substituted         cycloalkyl, optionally substituted 5-6 membered heterocyclyl,         optionally substituted phenyl, halosulfonyl, cyano,         alkylaminoalkoxy, alkylaminoalkoxyalkoxy, nitro, lower alkyl         substituted with R¹, lower alkenyl substituted with R¹, and         lower alkynyl substituted with R¹;     -   wherein R³ is selected from aryl substituted with one or more         substituents independently selected from halo, —OR⁷, —SR⁷,         —SO₂R⁷, —CO₂R⁷, —CONR⁷R⁷, —COR⁷, —NR⁷R⁷, —SO₂NR⁷R⁷, —NR⁷C(O)OR⁷,         —NR⁷C(O)R⁷, cycloalkyl, optionally substituted 5-6 membered         heterocyclyl, optionally substituted phenyl, nitro,         alkylaminoalkoxyalkoxy, cyano, alkylaminoalkoxy, lower alkyl         substituted with R¹, lower alkenyl substituted with R¹, and         lower alkynyl substituted with R¹;     -   wherein R⁴ is selected from a direct bond, C₂₋₄-alkylenyl,         C₂₋₄-alkenylenyl and C₂₋₄-alkynylenyl, where one of the CH₂         groups may be substituted with an oxygen atom or an —NH—,     -   wherein R⁴ is optionally substituted with hydroxy;     -   wherein R⁵ is selected from H, lower alkyl, phenyl and lower         aralkyl;     -   wherein R^(5a) is selected from H, lower alkyl, phenyl and lower         aralkyl;     -   wherein R⁶ is selected from H or C₁₋₆-alkyl; and     -   wherein R⁷ is selected from H, lower alkyl, phenyl, 5-6 membered         heterocyclyl, C₃-C₆-cycloalkyl, phenylalkyl, 5-6 membered         heterocyclylalkyl, C₃-C₆ cycloalkylalkyl, and lower haloalkyl;     -   wherein R⁹ is selected from H, phenyl, 5-6 membered heterocyclyl         and C₃-C₆ cycloalkyl.         Combinations

While the compounds of the invention can be administered as the sole active pharmaceutical agent, they can also be used in combination with one or more compounds of the invention or other agents. When administered as a combination, the therapeutic agents can be formulated as separate compositions that are administered at the same time or sequentially at different times, or the therapeutic agents can be given as a single composition.

The phrase “co-therapy” (or “combination-therapy”), in defining use of a compound of the present invention and another pharmaceutical agent, is intended to embrace administration of each agent in a sequential manner in a regimen that will provide beneficial effects of the drug combination, and is intended as well to embrace co-administration of these agents in a substantially simultaneous manner, such as in a single capsule having a fixed ratio of these active agents or in multiple, separate capsules for each agent.

Specifically, the administration of compounds of the present invention may be in conjunction with additional therapies known to those skilled in the art in the prevention or treatment of neoplasia, such as with radiation therapy or with cytostatic or cytotoxic agents.

If formulated as a fixed dose, such combination products employ the compounds of this invention within the accepted dosage ranges. Compounds of Formulas I-IV may also be administered sequentially with known anticancer or cytotoxic agents when a combination formulation is inappropriate. The invention is not limited in the sequence of administration; compounds of the invention may be administered either prior to, simultaneous with, or after administration of the known anticancer or cytotoxic agent.

Currently, standard treatment of primary tumors consists of surgical excision followed by either radiation or IV administered chemotherapy. The typical chemotherapy regime consists of either DNA alkylating agents, DNA intercalating agents, CDK inhibitors, or microtubule poisons. The chemotherapy doses used are just below the maximal tolerated dose and therefore dose limiting toxicities typically include, nausea, vomiting, diarrhea, hair loss, neutropenia and the like.

There are large numbers of antineoplastic agents available in commercial use, in clinical evaluation and in pre-clinical development, which would be selected for treatment of neoplasia by combination drug chemotherapy. Such antineoplastic agents fall into several major categories, namely, antibiotic-type agents, alkylating agents, antimetabolite agents, hormonal agents, immunological agents, interferon-type agents and a category of miscellaneous agents.

A first family of antineoplastic agents which may be used in combination with compounds of the present invention consists of antimetabolite-type/thymidilate synthase inhibitor antineoplastic agents. Suitable antimetabolite antineoplastic agents may be selected from but not limited to the group consisting of 5-FU-fibrinogen, acanthifolic acid, aminothiadiazole, brequinar sodium, carmofur, Ciba-Geigy CGP-30694, cyclopentyl cytosine, cytarabine phosphate stearate, cytarabine conjugates, Lilly DATHF, Merrel Dow DDFC, dezaguanine, dideoxycytidine, dideoxyguanosine, didox, Yoshitomi DMDC, doxifluridine, Wellcome EHNA, Merck & Co. EX-015, fazarabine, floxuridine, fludarabine phosphate, 5-fluorouracil, N-(2′-furanidyl)-5-fluorouracil, Daiichi Seiyaku FO-152, isopropyl pyrrolizine, Lilly LY-188011, Lilly LY-264618, methobenzaprim, methotrexate, Wellcome MZPES, norspermidine, NCI NSC-127716, NCI NSC-264880, NCI NSC-39661, NCI NSC-612567, Warner-Lambert PALA, pentostatin, piritrexim, plicamycin, Asahi Chemical PL-AC, Takeda TAC-788, thioguanine, tiazofurin, Erbamont TIF, trimetrexate, tyrosine kinase inhibitors, Taiho UFT and uricytin.

A second family of antineoplastic agents which may be used in combination with compounds of the present invention consists of alkylating-type antineoplastic agents. Suitable alkylating-type antineoplastic agents may be selected from but not limited to the group consisting of Shionogi 254-S, aldo-phosphamide analogues, altretamine, anaxirone, Boehringer Mannheim BBR-2207, bestrabucil, budotitane, Wakunaga CA-102, carboplatin, carmustine, Chinoin-139, Chinoin-153, chlorambucil, cisplatin, cyclophosphamide, American Cyanamid CL-286558, Sanofi CY-233, cyplatate, Degussa D-19-384, Sumimoto DACHP(Myr)2, diphenylspiromustine, diplatinum cytostatic, Erba distamycin derivatives, Chugai DWA-2114R, ITI E09, elmustine, Erbamont FCE-24517, estramustine phosphate sodium, fotemustine, Unimed G-6-M, Chinoin GYKI-17230, hepsul-fam, ifosfamide, iproplatin, lomustine, mafosfamide, mitolactol, Nippon Kayaku NK-121, NCI NSC-264395, NCI NSC-342215, oxaliplatin, Upjohn PCNU, prednimustine, Proter PTT-119, ranimustine, semustine, SmithKline SK&F-101772, Yakult Honsha SN-22, spiromus-tine, Tanabe Seiyaku TA-077, tauromustine, temozolomide, teroxirone, tetraplatin and trimelamol.

A third family of antineoplastic agents which may be used in combination with compounds of the present invention consists of antibiotic-type antineoplastic agents. Suitable antibiotic-type antineoplastic agents may be selected from but not limited to the group consisting of Taiho 4181-A, aclarubicin, actinomycin D, actinoplanone, Erbamont ADR-456, aeroplysinin derivative, Ajinomoto AN-201-II, Ajinomoto AN-3, Nippon Soda anisomycins, anthracycline, azino-mycin-A, bisucaberin, Bristol-Myers BL-6859, Bristol-Myers BMY-25067, Bristol-Myers BMY-25551, Bristol-Myers BMY-26605, Bristol-Myers BMY-27557, Bristol-Myers BMY-28438, bleomycin sulfate, bryostatin-1, Taiho C-1027, calichemycin, chromoximycin, dactinomycin, daunorubicin, Kyowa Hakko DC-102, Kyowa Hakko DC-79, Kyowa Hakko DC-88A, Kyowa Hakko DC89-A1, Kyowa Hakko DC92-B, ditrisarubicin B, Shionogi DOB-41, doxorubicin, doxorubicin-fibrinogen, elsamicin-A, epirubicin, erbstatin, esorubicin, esperamicin-Al, esperamicin-Alb, Erbamont FCE-21954, Fujisawa FK-973, fostriecin, Fujisawa FR-900482, glidobactin, gregatin-A, grincamycin, herbimycin, idarubicin, illudins, kazusamycin, kesarirhodins, Kyowa Hakko KM-5539, Kirin Brewery KRN-8602, Kyowa Hakko KT-5432, Kyowa Hakko KT-5594, Kyowa Hakko KT-6149, American Cyanamid LL-D49194, Meiji Seika ME 2303, menogaril, mitomycin, mitoxantrone, SmithKline M-TAG, neoenactin, Nippon Kayaku NK-313, Nippon Kayaku NKT-01, SRI International NSC-357704, oxalysine, oxaunomycin, peplomycin, pilatin, pirarubicin, porothramycin, pyrindanycin A, Tobishi RA-I, rapamycin, rhizoxin, rodorubicin, sibanomicin, siwenmycin, Sumitomo SM-5887, Snow Brand SN-706, Snow Brand SN-07, sorangicin-A, sparsomycin, SS Pharmaceutical SS-21020, SS Pharmaceutical SS-7313B, SS Pharmaceutical SS-9816B, steffimycin B, Taiho 4181-2, talisomycin, Takeda TAN-868A, terpentecin, thrazine, tricrozarin A, Upjohn U-73975, Kyowa Hakko UCN-10028A, Fujisawa WF-3405, Yoshitomi Y-25024 and zorubicin.

A fourth family of antineoplastic agents which may be used in combination with compounds of the present invention consists of a miscellaneous family of antineoplastic agents, including tubulin interacting agents, topoisomerase II inhibitors, topoisomerase I inhibitors and hormonal agents, selected from but not limited to the group consisting of α-carotene, α-difluoromethyl-arginine, acitretin, Biotec AD-5, Kyorin AHC-52, alstonine, amonafide, amphethinile, amsacrine, Angiostat, ankinomycin, anti-neoplaston A10, antineoplaston A2, antineoplaston A3, antineoplaston A5, antineoplaston AS2-1, Henkel APD, aphidicolin glycinate, asparaginase, Avarol, baccharin, batracylin, benfluron, benzotript, Ipsen-Beaufour BIM-23015, bisantrene, Bristol-Myers BMY-40481, Vestar boron-10, bromofosfamide, Wellcome BW-502, Wellcome BW-773, caracemide, carmethizole hydrochloride, Ajinomoto CDAF, chlorsulfaquinoxalone, Chemes CHX-2053, Chemex CHX-100, Warner-Lambert CI-921, Warner-Lambert CI-937, Warner-Lambert CI-941, Warner-Lambert CI-958, clanfenur, claviridenone, ICN compound 1259, ICN compound 4711, Contracan, Yakult Honsha CPT-11, crisnatol, curaderm, cytochalasin B, cytarabine, cytocytin, Merz D-609, DABIS maleate, dacarbazine, datelliptinium, didemnin-B, dihaematoporphyrin ether, dihydrolenperone, dinaline, distamycin, Toyo Pharmar DM-341, Toyo Pharmar DM-75, Daiichi Seiyaku DN-9693, docetaxel elliprabin, elliptinium acetate, Tsumura EPMTC, the epothilones,_ergotamine, etoposide, etretinate, fenretinide, Fujisawa FR-57704, gallium nitrate, genkwadaphnin, Chugai GLA-43, Glaxo GR-63178, grifolan NMF-5N, hexadecylphosphocholine, Green Cross HO-221, homoharringtonine, hydroxyurea, BTG ICRF-187, ilmofosine, isoglutamine, isotretinoin, Otsuka JI-36, Ramot K-477, Otsuak K-76COONa, Kureha Chemical K-AM, MECT Corp KI-8110, American Cyanamid L-623, leukoregulin, lonidamine, Lundbeck LU-23-112, Lilly LY-186641, NCI (US) MAP, marycin, Merrel Dow MDL-27048, Medco MEDR-340, merbarone, merocyanlne derivatives, methylanilinoacridine, Molecular Genetics MGI-136, minactivin, mitonafide, mitoquidone mopidamol, motretinide, Zenyaku Kogyo MST-16, N-(retinoyl)amino acids, Nisshin Flour Milling N-021, N-acylated-dehydroalanines, nafazatrom, Taisho NCU-190, nocodazole derivative, Normosang, NCI NSC-145813, NCI NSC-361456, NCI NSC-604782, NCI NSC-95580, ocreotide, Ono ONO-112, oquizanocine, Akzo Org-10172, paclitaxel, pancratistatin, pazelliptine, Warner-Lambert PD-111707, Warner-Lambert PD-115934, Warner-Lambert PD-131141, Pierre Fabre PE-1001, ICRT peptide D, piroxantrone, polyhaematoporphyrin, polypreic acid, Efamol porphyrin, probimane, procarbazine, proglumide, Invitron protease nexin I, Tobishi RA-700, razoxane, Sapporo Breweries RBS, restrictin-P, retelliptine, retinoic acid, Rhone-Poulenc RP-49532, Rhone-Poulenc RP-56976, SmithKline SK&F-104864, Sumitomo SM-108, Kuraray SMANCS, SeaPharm SP-10094, spatol, spirocyclopropane derivatives, spirogermanium, Unimed, SS Pharmaceutical SS-554, strypoldinone, Stypoldione, Suntory SUN 0237, Suntory SUN 2071, superoxide dismutase, Toyama T-506, Toyama T-680, taxol, Teijin TEI-0303, teniposide, thaliblastine, Eastman Kodak TJB-29, tocotrienol, topotecan, Topostin, Teijin TT-82, Kyowa Hakko UCN-01, Kyowa Hakko UCN-1028, ukrain, Eastman Kodak USB-006, vinblastine sulfate, vincristine, vindesine, vinestramide, vinorelbine, vintriptol, vinzolidine, withanolides and Yamanouchi YM-534.

Alternatively, the present compounds may also be used in co-therapies with other anti-neoplastic agents, such as acemannan, aclarubicin, aldesleukin, alemtuzumab, alitretinoin, altretamine, amifostine, aminolevulinic acid, amrubicin, amsacrine, anagrelide, anastrozole, ANCER, ancestim, ARGLABIN, arsenic trioxide, BAM 002 (Novelos), bexarotene, bicalutamide, broxuridine, capecitabine, celmoleukin, cetrorelix, cladribine, clotrimazole, cytarabine ocfosfate, DA 3030 (Dong-A), daclizumab, denileukin diftitox, deslorelin, dexrazoxane, dilazep, docetaxel, docosanol, doxercalciferol, doxifluridine, doxorubicin, bromocriptine, carmustine, cytarabine, fluorouracil, HIT diclofenac, interferon alfa, daunorubicin, doxorubicin, tretinoin, edelfosine, edrecolomab, eflornithine, emitefur, epirubicin, epoetin beta, etoposide phosphate, exemestane, exisulind, fadrozole, filgrastim, finasteride, fludarabine phosphate, formestane, fotemustine, gallium nitrate, gemcitabine, gemtuzumab zogamicin, gimeracil/oteracil/tegafur combination, glycopine, goserelin, heptaplatin, human chorionic gonadotropin, human fetal alpha fetoprotein, ibandronic acid, idarubicin, (imiquimod, interferon alfa, interferon alfa, natural, interferon alfa-2, interferon alfa-2a, interferon alfa-2b, interferon alfa-N1, interferon alfa-n3, interferon alfacon-1, interferon alpha, natural, interferon beta, interferon beta-1a, interferon beta-1b, interferon gamma, natural interferon gamma-1a, interferon gamma-1b, interleukin-1 beta, iobenguane, irinotecan, irsogladine, lanreotide, LC 9018 (Yakult), leflunomide, lenograstim, lentinan sulfate, letrozole, leukocyte alpha interferon, leuprorelin, levamisole+fluorouracil, liarozole, lobaplatin, lonidamine, lovastatin, masoprocol, melarsoprol, metoclopramide, mifepristone, miltefosine, mirimostim, mismatched double stranded RNA, mitoguazone, mitolactol, mitoxantrone, molgramostim, nafarelin, naloxone+pentazocine, nartograstim, nedaplatin, nilutamide, noscapine, novel erythropoiesis stimulating protein, NSC 631570 octreotide, oprelvekin, osaterone, oxaliplatin, paclitaxel, pamidronic acid, pegaspargase, peginterferon alfa-2b, pentosan polysulfate sodium, pentostatin, picibanil, pirarubicin, rabbit antithymocyte polyclonal antibody, polyethylene glycol interferon alfa-2a, porfimer sodium, raloxifene, raltitrexed, rasburicase, rhenium Re 186 etidronate, RII retinamide, rituximab, romurtide, samarium (153 Sm) lexidronam, sargramostim, sizofiran, sobuzoxane, sonermin, strontium-89 chloride, suramin, tasonermin, tazarotene, tegafur, temoporfin, temozolomide, teniposide, tetrachlorodecaoxide, thalidomide, thymalfasin, thyrotropin alfa, topotecan, toremifene, tositumomab-iodine 131, trastuzumab, treosulfan, tretinoin, trilostane, trimetrexate, triptorelin, tumor necrosis factor alpha, natural, ubenimex, bladder cancer vaccine, Maruyama vaccine, melanoma lysate vaccine, valrubicin, verteporfin, vinorelbine, VIRULIZIN, zinostatin stimalamer, or zoledronic acid; abarelix; AE 941 (Aeterna), ambamustine, antisense oligonucleotide, bcl-2 (Genta), APC 8015 (Dendreon), cetuximab, decitabine, dexaminoglutethimide, diaziquone, EL 532 (Elan), EM 800 (Endorecherche), eniluracil, etanidazole, fenretinide, filgrastim SD01 (Amgen), fulvestrant, galocitabine, gastrin 17 immunogen, HLA-B7 gene therapy (Vical), granulocyte macrophage colony stimulating factor, histamine dihydrochloride, ibritumomab tiuxetan, ilomastat, IM 862 (Cytran), interleukin-2, iproxifene, LDI 200 (Milkhaus), leridistim, lintuzumab, CA 125 MAb (Biomira), cancer MAb (Japan Pharmaceutical Development), HER-2 and Fc MAb (Medarex), idiotypic 105AD7 MAb (CRC Technology), idiotypic CEA MAb (Trilex), LYM-1-iodine 131 MAb (Techniclone), polymorphic epithelial mucin-yttrium 90 MAb (Antisoma), marimastat, menogaril, mitumomab, motexafin gadolinium, MX 6 (Galderma), nelarabine, nolatrexed, P 30 protein, pegvisomant, pemetrexed, porfiromycin, prinomastat, RL 0903 (Shire), rubitecan, satraplatin, sodium phenylacetate, sparfosic acid, SRL 172 (SR Pharma), SU 5416 (SUGEN), TA 077 (Tanabe), tetrathiomolybdate, thaliblastine, thrombopoietin, tin ethyl etiopurpurin, tirapazamine, cancer vaccine (Biomira), melanoma vaccine (New York University), melanoma vaccine (Sloan Kettering Institute), melanoma oncolysate vaccine (New York Medical College), viral melanoma cell lysates vaccine (Royal Newcastle Hospital), or valspodar.

Alternatively, the present compounds may also be used in co-therapies with other anti-neoplastic agents, such as other kinase inhibitors including p38 inhibitors and CDK inhibitors, TNF inhibitors, metallomatrix proteases inhibitors (MMP), COX-2 inhibitors including celecoxib, rofecoxib, parecoxib, valdecoxib, and etoricoxib, NSAID's, SOD mimics or α_(v)β₃ inhibitors.

The present invention comprises processes for the preparation of a compound of Formulas I-IV.

Also included in the family of compounds of Formulas I-IV are the pharmaceutically-acceptable salts thereof. The term “pharmaceutically-acceptable salts” embraces salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. The nature of the salt is not critical, provided that it is pharmaceutically-acceptable. Suitable pharmaceutically-acceptable acid addition salts of compounds of Formulas I-IV may be prepared from an inorganic acid or from an organic acid. Examples of such inorganic acids are hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric and phosphoric acid. Appropriate organic acids may be selected from aliphatic, cycloaliphatic, aromatic, arylaliphatic, heterocyclic, carboxylic and sulfonic classes of organic acids, example of which are formic, acetic, adipic, butyric, propionic, succinic, glycolic, gluconic, lactic, malic, tartaric, citric, ascorbic, glucuronic, maleic, fumaric, pyruvic, aspartic, glutamic, benzoic, anthranilic, mesylic, 4-hydroxybenzoic, phenylacetic, mandelic, embonic (pamoic), methanesulfonic, ethanesulfonic, ethanedisulfonic, benzenesulfonic, pantothenic, 2-hydroxyethanesulfonic, toluenesulfonic, sulfanilic, cyclohexylaminosulfonic, camphoric, camphorsulfonic, digluconic, cyclopentanepropionic, dodecylsulfonic, glucoheptanoic, glycerophosphonic, heptanoic, hexanoic, 2-hydroxy-ethanesulfonic, nicotinic, 2-naphthalenesulfonic, oxalic, palmoic, pectinic, persulfuric, 2-phenylpropionic, picric, pivalic propionic, succinic, tartaric, thiocyanic, mesylic, undecanoic, stearic, algenic, β-hydroxybutyric, salicylic, galactaric and galacturonic acid. Suitable pharmaceutically-acceptable base addition salts of compounds of Formulas I-IV include metallic salts, such as salts made from aluminum, calcium, lithium, magnesium, potassium, sodium and zinc, or salts made from organic bases including primary, secondary and tertiary amines, substituted amines including cyclic amines, such as caffeine, arginine, diethylamine, N-ethyl piperidine, aistidine, glucamine, isopropylamine, lysine, morpholine, N-ethyl morpholine, piperazine, piperidine, triethylamine, trimethylamine. All of these salts may be prepared by conventional means from the corresponding compound of the invention by reacting, for example, the appropriate acid or base with the compound of Formulas I-IV.

Also, the basic nitrogen-containing groups can be quaternized with such agents as lower alkyl halides, such as methyl, ethyl, propyl, and butyl chloride, bromides and iodides; dialkyl sulfates like dimethyl, diethyl, dibutyl, and diamyl sulfates, long chain halides such as decyl, lauryl, myristyl and stearyl chlorides, bromides and iodides, aralkyl halides like benzyl and phenethyl bromides, and others. Water or oil-soluble or dispersible products are thereby obtained.

Examples of acids that may be employed to form pharmaceutically acceptable acid addition salts include such inorganic acids as hydrochloric acid, sulphuric acid and phosphoric acid and such organic acids as oxalic acid, maleic acid, succinic acid and citric acid. Other examples include salts with alkali metals or alkaline earth metals, such as sodium, potassium, calcium or magnesium or with organic bases. Preferred salts include hydrochloride, phosphate and edisylate.

Additional examples of such salts can be found in Berge et al., J. Pharm. Sci., 66:1 (1977).

General Synthetic Procedures

The compounds of the invention can be synthesized according to the following procedures of Schemes 1-43, wherein the substituents are as defined for Formulas I-IV, above, except where further noted.

Cyclic amides can be prepared according to the method set out in Scheme 1. The amino group of compound 1 (where R^(o) is alkyl, aryl, and the like) is protected, such as with Boc anhydride, followed by treatment, to remove the ester, such as with base, forming the protected amine/free acid 2. Alternatively, other amino protecting groups known in the art can be used. Substituted amines are coupled with the free acid, such as with EDC, to form the protected amine/amide 3. The protected amine moiety is removed, such as with acid, and reacted via one step reductive alkylation with carbonyl-containing compounds to form the 1-amido-2-substituted amino-compounds 4. Preferably the amination is in an alcohol, such as MeOH, EtOH or propanol, and at a temperature between about 0-50° C., such as RT. Aldehydes or ketones are preferred carbonyl-containing compounds. Alternative carbonyl-containing compounds are, for example, bisulfite adducts or semiacetals, acetals, semiketals or ketals of compounds with alcohols, for example lower hydroxyalkyl compounds; or thioacetals or thioketals of compounds with mercaptans, for example lower alkylthio compounds. The reductive alkylation is preferably carried out with hydrogenation in the presence of a catalyst, such as platinum or especially palladium, which is preferably bonded to a carrier material, such as carbon, or a heavy metal catalyst, such as Raney nickel, at normal pressure or at pressures of from 0.1 to 10 MegaPascal (MPa), or with reduction by means of complex hydrides, such as borohydrides, especially alkali metal cyanoborohydrides, for example sodium cyanoborohydride, in the presence of a suitable acid, preferably relatively weak acids, such as lower alkylcarboxylic acids, especially acetic acid, or a sulfonic acid, such as p-toluenesulfonic acid; in customary solvents, for example alcohols, such as methanol or ethanol, or ethers, for example cyclic ethers, such as tetrahydrofuran, in the presence or absence of water.

Alternatively, compounds 4 can be prepared from mixed acid/amines 5 as shown in Scheme 2. Substituted amines are coupled with the mixed acid/amines 5 such as with a coupling reagent, for example EDC, to form the mixed amine/amide 6. Substituted carbonyl compounds, such as acid halides, anhydrides, carboxylic acids, esters, ketones, aldehydes and the like, are added to the mixed amine/amide 6 followed with reduction to give the substituted amide/substituted amine compounds 4.

Imino compounds 7 can be formed from the mixed amine/amides 6, such as by reacting with a substituted carbonyl compound.

Substituted cyclic carboxamides can be prepared from the corresponding imino analogs by the process outlined in Scheme 4. Treatment of the imino compound 7 with a reducing agent yields compound 4. Reagents which can be used to add hydrogen to an imine double bond include borane in THF, LiAlH₄, NaBH₄, sodium in EtOH and hydrogen in the presence of a catalyst, among others.

Substituted carboxamides 4 can be prepared from the corresponding halo analogs 8 by the process outlined in Scheme 5. Substituted amino acids 9 are prepared from the corresponding chloro compounds 8 such as by reacting with an amine at a suitable temperature, such as about 80° C. The acid 9 is coupled with an amine, preferably in the presence of a coupling agent such as EDC, to form the corresponding amide 4.

The amination process can be carried out as an Ullmann type reaction using a copper catalyst, such as copper[0] or a copper[I] compound such as copper[I]oxide, copper[I]bromide or copper[I]iodide in the presence of a suitable base (such as a metal carbonate, for example K₂CO₃) to neutralize the acid generated in the reaction. This reaction is reviewed in Houben-Weyl “Methoden der Organischen Chemie”, Band 11/1, page 32-33, 1958, in Organic Reactions, 14:19-24 (1965) and by J. Lindley in Tetrahedron, 40:1433-1456 (1984). The amount of catalyst is typically in the range of 1 to 20 mole percent. The reaction is carried out in an inert, aprotic solvent such as an ether (for example, dimethoxyethane or dioxane) or an amide (for example dimethylformamide or N-methylpyrrolidone), under an inert atmosphere in the temperature range of 60-180° C.

An alternative amination process involves using a Group VIII element, where the metal core of the catalyst should be a zero-valent transition metal, such as palladium or nickel, which has the ability to undergo oxidative addition to the aryl-halogen bond. The zero valent state of the metal may be generated in situ from the M[II] state. The catalyst complexes may include chelating ligands, such as alkyl, aryl or heteroaryl derivatives of phosphines or biphosphines, imines or arsines. Preferred catalysts contain palladium or nickel. Examples of such catalysts include palladium[II]chloride, palladium[II]acetate, tetrakis(triphenyl-phosphine)palladium[0] and nickel[II]acetylacetonate. The metal catalyst is typically in the range of 0.1 to 10 mole percent. The chelating ligands may be either monodentate, as in the case for example of trialkyphosphines, such as tributylphosphine, triarylphosphines, such as tri-(ortho-tolyl)phosphine, and triheteroaryl phosphines, such as tri-2-furylphosphine; or they may be bidentate such as in the case of 2,2′-bis(diphenylphosphino)-1,1′binaphthyl, 1,2-bis(diphenylphosphino)ethane, 1,1′-bis(diphenylphosphino)ferrocene and 1-(N,N-dimethyl-amino)-1′-(dicyclohexylphosphino)biphenyl. The supporting ligand may be complexed to the metal center in the form of a metal complex prior to being added to the reaction mixture or may be added to the reaction mixture as a separate compound. The supporting ligand is typically present in the range 0.01 to 20 mole percent. It is often necessary to add a suitable base to the reaction mixture, such as a trialkylamine (for example DIEA or 1,5-diazabicyclo[5,4,O]undec-5-ene), a Group I alkali metal alkoxide (for example potassium tert-butoxide) or carbonate (for example cesium carbonate) or potassium phosphate. The reaction is typically carried out in an inert aprotic solvent such as an ether (for example, dimethoxyethane or dioxane) or an amide (for example DMF or N-methylpyrrolidone), under an inert atmosphere in the temperature range of 60-180° C.

The amination is preferably carried out in an inert, aprotic, preferably anhydrous, solvent or solvent mixture, for example in a carboxylic acid amide, for example dimethylformamide or dimethylacetamide, a cyclic ether, for example THF or dioxane, or a nitrile, for example CH₃CN, or in a mixture thereof, at an appropriate temperature, for example in a temperature range of from about 40° C. to about 180° C., and if necessary under an inert gas atmosphere, for example a nitrogen or argon atmosphere.

Substituted carboxamides 4 can be prepared from the corresponding halo analogs 8 by the process outlined in Scheme 6. The chloro acid 8 is coupled with an amine, preferably in the presence of a coupling agent such as EDC, to form the corresponding chloro amide 10. Substituted amino-amides 4 are prepared from the corresponding chloro compounds 10 such as by reacting with an amine at a suitable temperature, such as about 80° C. The amination reaction can be run in the presence of an appropriate catalyst such as a palladium catalyst, in the presence of an aprotic base such as sodium t-butoxide or cesium carbonate, or a nickel catalyst, or a copper catalyst.

Substituted carboxamides 4 can be prepared from the corresponding bromo/chloro analogs 11 by the process outlined in Scheme 7. The bromo/chloro acid 11 is coupled with an amine, preferably in the presence of a coupling agent such as EDC, to form the corresponding bromo substituted amide 12. Suzuki coupling with the bromo amide 12 and suitable boronic acids provides the substituted amide 10. Substituted amino-amides 4 are prepared from the corresponding chloro compounds 10 as described in Scheme 6.

Substituted pyridines can be prepared such as by the method found in Scheme 8. 2-Aminonicotinic acid 13 is coupled with a substituted amine at a suitable temperature, nonprotic solvent such as CH₂Cl₂, such as with EDC and HOBt, to form the nicotinamide 14. The nicotinamide 14 is reductively alkylated such as with substituted 4-benzaldehydes and NaBH(OAc)₃, to yield the 2-substituted amino-pyridyl carboxamides 15.

Substituted pyridines may be prepared by the method found in Scheme 9. 2-Chloro-nicotinic acid 16 (where LG is OH) is coupled with an amine at a suitable temperature, such as a temperature over about 100° C. to give the 2-substituted amino-nicotinic acid 17. The 2-substituted amino-nicotinic acid 17 is reacted with a substituted amine in the presence of a coupling reagent, such as BOP-Cl and base, such as TEA to form the 2-substituted amino-nicotinamide 15.

Alternatively, 2-chloro-nicotinoyl chloride (LG is Cl) is coupled first with R²—NH₂, such as in the presence of base, e.g., NaHCO₃, in a suitable solvent, such as CH₂Cl₂, to form the amide 16A, then coupled with a benzylamine to yield the 2-substituted amino-nicotinamide 15.

Imino-substituted pyridines may be prepared by the method found in Scheme 10. (2-Amino-(4-pyridyl))-carboxamide 18 is reacted with substituted 4-benzaldehydes, such as in the presence of p-toluenesulfonic acid monohydrate to yield the imino compound 19.

Substituted pyridines alternatively may be prepared by the method found in Scheme 11. The imino compound 19 is reduced, such as with NaBH₄, to form the substituted amine 20.

Substituted pyridines can be prepared by the process outlined in Scheme 12. A solution of sodium hypobromite is freshly prepared and added to 2-hydroxynicotinic acid 21 and heated, preferably at a temperature at about 50° C. Additional hypobromite solution may be needed to form the bromo compound 22. The 5-bromo-2-hydroxynicotinic acid 22 is reacted with thionyl chloride, preferably at a temperature>RT, more preferably at about 80° C. to form the 2-chloro-nicotinic acid analog 23. The acid is coupled with an amine, preferably in the presence of EDC, HOBT, and DIEA to form the corresponding substituted amide 24. Suzuki coupling with the bromo amide and suitable boronic acids, provides the substituted nicotinamide 25. 2-Amino-nicotinamides 26 are prepared from the corresponding chloro compounds 25 such as by reacting with substituted amines at a suitable temperature, such as about 80° C.

Alternatively, sulfonamides 27 can be prepared from amines 6 as shown in Scheme 13. Substituted sulfonyl compounds, such as sulfonyl halides, preferably chloro or bromo, sulfonic acids, an activated ester or reactive anhydride, or in the form of a cyclic amide, and the like, are added to the amine 6 to give the sulfonamide compounds 27.

The reaction is carried out in a suitable solvent, such as CH₂Cl₂, at a temperature between about RT to about the reflux temperature of the solvent, in the presence of a suitable base, such as DIEA or DMAP.

The amino group of compounds 6 is preferably in free form, especially when the sulfonyl group reacting therewith is present in reactive form. The amino group may, however, itself be a derivative, for example by reaction with a phosphite, such as diethylchlorophosphite, 1,2-phenylene chlorophosphite, ethyldichlorophosphite, ethylene chlorophosphite or tetraethylpyrophosphite. A derivative of such a compound having an amino group also can be a carbamic acid halide or an isocyanate.

The condensation of activated sulfonic esters, reactive anhydrides or reactive cyclic amides with the corresponding amines is customarily carried out in the presence of an inorganic base, such as an alkaline metal hydrogen carbonate of carbonate, or especially an organic base, for example simple lower (alkyl)₃-amines, for example TEA or tributylamine, or one of the above-mentioned organic bases. If desired, a condensation agent is additionally used, for example as described for free carboxylic acids.

The condensation is preferably carried out in an inert, aprotic, preferably anhydrous, solvent or solvent mixture, for example in a carboxylic acid amide, for example formamide or DMF, a halogenated hydrocarbon, for example CH₂Cl₂, CCl₄ or chlorobenzene, a ketone, for example acetone, a cyclic ether, for example THF or dioxane, an ester, for example EtOAc, or a nitrile, for example CH₃CN, or in a mixture thereof, as appropriate at reduced or elevated temperature, for example in a temperature range of from about −40° C. to about 100° C., preferably from about −10° C. to about 70° C., and when arylsulfonyl esters are used also at temperatures of from about 10-30° C., and if necessary under an inert gas atmosphere, for example a nitrogen or argon atmosphere.

Alcoholic solvents, for example EtOH, or aromatic solvents, for example benzene or toluene, may also be used. When alkali metal hydroxides are present as bases, acetone may also be added where appropriate.

Substituted pyridines can be prepared by the process outlined in Scheme 14. 2-Chloronicotinic acid 28 and substituted amine are coupled under conditions similar to that described in the previous schemes to give the amide 29. 6-Chloro-2-aminopyridines 30 are prepared from the amide 29, such as by reacting with substituted amines at a suitable temperature, such as above about 80° C., preferably above about 100° C., more preferably at about 130° C., neat. 6-Chloro-2-aminopyridines 30 are de-chlorinated such as by hydrogenation, for example by treatment with H₂ in the presence of Pd/C, to yield other compounds of the present invention 31.

1,2,3,6-Tetrahydro-pyridyl substituted anilines (where R^(x) is a substituent selected from those available for substituted R²) are prepared such as by the procedure described in Scheme 15. Nitrobenzenes 32 are brominated, such as with bromine in the presence of acid, H₂SO₄ for example, or with NBS to yield the 3-bromo derivative 33. Suzuki coupling of the bromo-derivative 33 and a substituted pyridylboronic acid, such as at a temperature above RT, preferably above about 50° C., and more preferably at about 80° C., yields the pyridyl derivative 34. Alkylation of the nitrophenyl-pyridine 34, such as by treatment with iodomethane, preferably above about 50° C., and more preferably at about 80° C., yields the pyridinium compound 35, which upon reduction, such as by NaBH₄, yields the tetrahydyropyridine 36.

6-Amino substituted pyridines are prepared such as by the procedure described in Scheme 16. Similar to the method of Scheme 13, chloropyridine 37 and is reacted with an amine, preferably above about 50° C., and more preferably at about 80° C., to yield the 6-aminopyridines 38.

A series of substituted anilines are prepared such as by the procedure described in Scheme 17. A nitrobenzyl bromide 39 is coupled with morpholine, such as at a temperature at about RT, to yield the heterocyclylmethyl nitrobenzene derivative. Reduction of the nitro compound, such as with iron powder, preferably above about 50° C., and more preferably at about 80° C., yields the heterocyclylmethyl substituted aniline 40.

Protected alkylamine substituted anilines can be prepared from the nitro free amines 41, such as with standard protecting agents and chemistry known in the art, such as BOC chemistry. Reduction of the protected nitro compound, such as with iron powder, preferably above about 50° C., and more preferably at about 80° C., yields the aniline 42.

Sulfonamide substituted anilines can be prepared from nitrobenzenesulfonyl chlorides 43. Coupling of nitrobenzenesulfonyl chlorides 43 with reactive heterocyclic compounds, such as substituted piperazines, piperidines, and the like, in a protic solvent such as EtOH, such as at a temperature about RT, yields the nitrobenzenesulfonamides 43. Reduction of the nitro benzenesulfonamide, such as with iron powder, preferably above about 50° C., and more preferably at about 80° C., yields the aniline 44.

A series of perhaloalkyl-substituted anilines 47, where R^(y) represents perhaloalkyl radicals, are prepared such as by the procedure described in Scheme 18. 1-Nitro-4-(perfluoroethyl)benzene can be synthesized by the method described in the reference [John N. Freskos, Synthetic Communications, 18(9):965-972 (1988)]. Alternatively, 1-Nitro-4-(perfluoroalkyl)benzene can be synthesized from the nitro compound, where LG is a leaving group, such as iodo, by the method described by W. A. Gregory, et al. [J. Med. Chem., 33:2569-2578 (1990)].

Reduction of the nitrobenzenes 46, such as with iron powder, at a temperature above about 50° C., and preferably at about 80° C., yields the aniline 47. Hydrogenation, such as with H₂ atmosphere in the presence of catalyst, such as 10% Pd/C, is also possible.

Additional series of substituted anilines (where R^(x) is a substituent selected those available for substituted R²)—are prepared such as by the procedures described in Scheme 19. 2-Alkoxy substituted anilines 50 are prepared from the corresponding phenol compounds 48 such as by the Mitsunobu reaction, including treatment with a N,N-dialkylethanolamine and PPh₃ and DEAD to give the corresponding nitro compound 49, followed by hydrogenation, such as with H₂ to give the aniline 50.

Alternatively, piperazinyl substituted anilines 53 can be prepared by the treatment of an aniline 51 with an N-substituted-bis(2-chloroethyl)amine, base, such as K₂CO₃ and NaI, at a temperature above about 50° C., preferably above about 100° C., and more preferably at about 170° C., to give the piperazinylbenzene compound 52. Nitration, such as with H₂SO₄ and KNO₃, at a temperature above 0° C., and preferably at about RT, followed by hydrogenation, such as with H₂ atmosphere gives the substituted aniline 53.

Alternatively, piperazinyl substituted anilines 56 can be prepared by the treatment of a fluoro-nitro-substituted aryl compounds 54. The fluoro-nitro-substituted aryl compounds 54 and 1-substituted piperazines are heated, preferably neat, at a temperature above about 50° C., and preferably at about 90° C., to yield the piperazinyl-nitroaryl compounds 55. Hydrogenation, such as with H₂ atmosphere in the presence of a catalyst, such as 10% Pd/C, gives the substituted aniline 56.

Substituted indolines are prepared such as by the procedures described in Scheme 20. Substituted amino-indolines 59 are prepared from the nitroindoline 57 and a ketone in the presence of NaHB(OAc)₃ to form the 1-substituted indoline 58. The nitroindoline 58 is hydrogenated, such as with H₂ in the presence of a catalyst, such as Pd/C, to yield the amino-indoline 59.

Alternatively, substituted amino-indolines 62 are prepared from the nitroindoline 57. Nitroindoline 57, is reacted with an acid chloride to form an amide. Further treatment with a primary or secondary amine, preferably a secondary amine, such as in the presence of NaI, at a temperature above about 50° C., and preferably at about 70° C. yields the nitroindoline 60. The nitro compound 60 is hydrogenated, such as with H₂ in the presence of a catalyst, such as Pd/C, to yield the amino-indoline 61. The carbonyl is reduced, such as with BH₃-THF, to yield 1-aminoalkyl-indolines 62.

Substituted indolines are prepared such as by the procedures described in Scheme 21. Substituted acetamides 64 are prepared from the coupling of halo-5-nitroanilines 63 (where LG is bromo or chloro, preferably chloro) and an acylating agent, such as acetyl chloride or acetic anhydride, under standard coupling chemistry, such as with DIEA, and DMAP, at a temperature of about RT, in a suitable solvent, such as CH₂Cl₂, DMF and/or DMAC. The N-(2-methylprop-2-enyl)acetamide 65 is prepared from the acetamide 64, such as by the treatment of base, such as NaH in a suitable solvent such as NMP or anhydrous DMF and a 3-halo-2-methylpropene such as 3-bromo-2-methylpropene or 3-chloro-2-methylpropene, at a temperature between about 0° C. and RT, and preferably at about RT; or with CsCO₃ at a temperature above RT, preferably above about 50° C. and more preferably above about 60° C. Cyclization of the N-(2-methylprop-2-enyl)acetamide 65, such as by the Heck-type reaction (treatment with Pd(OAc)₂ in the presence of base, for example tetraethyl-ammonium chloride, sodium formate, and NaOAc) at a temperature above about 50° C., and preferably at about 80° C., yields the protected (3,3-dimethyl-2,3-dihydro-indol-1-yl)ethanone 66. Deprotection, such as with strong acid such as AcOH, or HCl at a temperature above about 50° C., and preferably at about 70-80° C., yields the 3,3-dimethyl-6-nitro-2,3-dihydro-indol-1-yl 67. Alternatively, the protected dihydro-6-nitro indoline 66 can be reduced, such as with Fe, or with 10% Pd/C in the presence of an excess of NH₄CO₂H, or with H₂ in the presence of a catalyst to form the protected dihydro-6-amino indoline 66a.

Substituted anilines are prepared such as by the procedures described in Scheme 22. Nitrophenyl esters 69 are formed from the acid 68, such as by treatment with MeOH and acid. Alkylation of the ester 69, such as by treatment with base, such as NaH, followed by alkyl halide, yields the branched alkyl compounds 70. Reduction of the ester 70, such as with BH₃, yields the alcohol 71. The aldehyde 72 is prepared from the alcohol 71, such as by treatment with TPAP in the presence of N-methylmorpholine-N-oxide. Subsequent treatment with methoxymethyltriphenylphosphonium chloride and KHMDS yields 72. Coupling of the aldehyde 72 with morpholine, such as with NaBH(OAc)₃ yields the tertiary amine 73. Reduction of the nitro compound, such as with acid, for example AcOH, and zinc yields the aniline 74.

Substituted aniline compounds (where R^(x) is a substituent selected those available for substituted R², preferably haloalkyl and alkyl) are prepared such as by the procedure described in Scheme 23. Alkynyl-aniline 81, prepared similar to that described in Scheme 23, is hydrogenated such as with H₂ in the presence of a catalyst, such as Pd(OH)₂, to yield the substituted alkyl 82.

Substituted bromophenyl compounds are prepared such as by the procedure described in Scheme 24. Bromine is added to an optionally substituted nitrobenzene 83, AgSO₄ and acid, such as H₂SO₄, to provide the bromo derivative 84.

Substituted anilines are prepared such as by the procedure described in Scheme 25 (where R^(t) and R^(v) are alkyl, or together with the nitrogen atom form a 4-6 membered heterocyclic ring). Acryloyl chloride 85 is reacted with an amine, preferably a secondary amine, such as at a temperature between about 0° C. and about RT, to form the amide 86. A bromo-nitrobenzene 84 is reacted with the amide 88, such as in the presence of base, for example TEA, together with Pd(OAc)₂ and Pd(PPh₃)₄, at a temperature above about 50° C., and preferably at about 120° C., such as in a sealed container, to form the substituted alkene 87. Hydrogenation of the alkene 87, such as with H₂ in the presence of a catalyst, for example Pd/C catalyst yields the substituted aniline 88. Reduction of the amide 88, such as with LiALH₄, at a temperature above about 50° C., and preferably at about 80° C. yields the aniline 89.

Substituted indoles are prepared such as by the procedure described in Scheme 26. A nitroindole 90 is coupled with a halo compound, in the presence of base, for example K₂CO₃. Heating at a temperature above about 50° C., and preferably at about reflux yields the substituted-nitro-1H-indole 91. Hydrogenation similar to conditions described above yieldS the amino derivative 92.

Substituted pyrimidines are prepared such as by the procedure described in Scheme 27. 2-Methylthio-5-pyrimidyl acids 95 are prepared from the corresponding esters 93 similar to procedures described above. The amides 96 are formed from the acids 95 by coupling with the amine such as in the presence of HATU and base, TEA for example. The methylthio group can be removed, such as with Raney-Ni and heat, preferably at about reflux temperature, to form the pyrimidine 97.

Substituted anilines are prepared such as by the procedure described in Scheme 28. Treatment with the haloalkyl alcohol 101 with an alcohol, such as in the presence of DEAD and PPh₃ yields the ether 102 or 103.

Functionalized pyridines are prepared such as by the procedure described in Scheme 29. 2-Fluoropyridine 104 is treated with base, such as LDA, at a temperature below about 0° C., and preferably at about −78° C., and quenched with a stream of dry CO₂ to form the nicotinic acid 105. Alternatively, solid CO₂ (dry ice) can be used, preferably dried with N₂ prior to use. The acid 105 is converted to the acid halide 106, such as by treatment with thionyl chloride and heating at a temperature above about 50° C., and preferably at about reflux.

Chloro-substituted pyridines 107 are prepared such as by the procedure described in Scheme 30. 2-Chloronicotinic acid is activated with ethyl chloroformate, in the presence of base, such as TEA, at a temperature of about RT. Reaction with an amine produces amide 107. Alternatively, the amine can be coupled with the acid chloride 108, such as with polymer-supported DIEA. Excess acid chloride is removed by treating the reaction mixture with polymer-supported trisamine resin, to form amide 107.

Amino-substituted indoles 111 are prepared such as by the procedure described in Scheme 31. Nitroindoline 109 is reacted with N-methyl-4-piperidone in the presence of NaOMe at a temperature above about 50° C., and preferably at about reflux, to form the 3-substituted indole 110. Hydrogenation as previously discussed yields the amino indole 111.

Alkylated indazoles can be prepared by the process outlined in Scheme 32. To a solution of 6-nitroindazole 112 in a solvent such as THF is added strong base, such as NaH at a temperature below RT, preferably at about 0° C. Alkylhalides, such as where R″ is methyl, are added and reacted at a temperature about RT to give 1-alkyl-6-nitro-1H-indazole 113. The nitro indazole 113 is hydrogenated, such as with an H₂ atmosphere in the presence of a catalyst, such as Pd/C to give the 1-substituted-6-amino-1H-indazole 114.

Brominated indazoles can be prepared by the process outlined in Scheme 33. NBS is slowly added to an acidic solution, such as a mixture of TFA:H₂SO₄ (5:1) and tert-butyl-4-nitrobenzene 115 at a temperature of about RT to yield the brominated compound 116.

Substituted anilines (where R^(x) is a substituent selected those available for substituted R²) can be prepared by the process outlined in Scheme 34. A mixture of 1-(substituted)-2-bromo-4-nitrobenzene 117 and N-methylpiperazine is heated, such as with or without solvent, preferably without solvent, at a temperature above RT, preferably at a temperature above about 100° C., and more preferably at a temperature at about 130° C. to give the 1-[5-(substituted)-2-nitrophenyl]-4-methylpiperazine 118. The nitro compound 118 is hydrogenated, such as with an H₂ atmosphere in the presence of a catalyst, such as Pd/C to furnish 4-(substituted)-2-(4-methylpiperazinyl)phenylamine 119.

Tricyclic heterocycles can be prepared by the process outlined in Scheme 35. 7-Nitro-2,3,4-trihydroisoquinolin-1-one 120 is heated in POCl₃ at a temperature above RT, preferably at a temperature sufficient for reflux, to form the 1-chloro-7-nitro-3,4-dihydroisoquinoline 121. The 1-chloro-7-nitro-3,4-dihydroisoquinoline 121 is dissolved in a solvent, such as THF, and H₂NNH₂ is added. The reaction is heated with HC(OEt)₃ at a temperature above RT, preferably at a temperature above about 75° C., and more preferably at a temperature at about 115° C. to give the nitro-substituted tricyclic. Hydrogenation, such as with an H₂ atmosphere in the presence of a catalyst, such as Pd/C, gives 2-amino-5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinoline 122.

Indolinyl substituted carboxamides can be prepared from the corresponding nitro indoline 123 by the process outlined in Scheme 36. For example, 3,3-dimethyl-6-nitroindoline 123 is alkylated, such as with N-protected-4-formylpiperidine in the presence of NaHB(OAC)₃ and acid, such as glacial AcOH, and solvent, such as dichloromethane, at a temperature of about RT, to afford the alkylated indane 124. Hydrogenation of the alkylated indane 124, such as with an H₂ atmosphere in the presence of a catalyst, such as Pd/C, in the presence of a solvent, such as an alcohol, preferably MeOH, to give the amino intermediate 125. Alternatively, other hydrogenation methods can be used, such as Fe powder with NH₄Cl. Coupling of the amine 125, such as with 2-chloronicotinic acid and DIEA, HOBt and EDC, in a solvent such as CH₂Cl₂ at a temperature of about RT provides the protected carboxamide 126, which upon deprotection and alkylation yields other compounds of the invention, 127 and 128, respectively. Alternatively, amine 125 is reacted with 2-fluoronicotinoyl chloride to form a 2-fluoronicotinamide, which can be alkylated, such as in Scheme 10.

Substituted anilines can be prepared by the process outlined in Scheme 37 (where R^(x) is a substituent selected those available for substituted R², preferably haloalkyl and alkyl). 1-Methyl-4-piperidinone 129 is added to a solution of strong base such as LiHMDS, in a solvent such as THF, at a temperature below RT, preferably lower than about −50° C., more preferably at about −78° C. Tf₂NPh is reacted with the enolate at a temperature of about RT, to give 1-methyl-4-(1,2,5,6-tetrahydro)pyridyl-(trifluoromethyl)sulfonate. A mixture of the triflate intermediate, bis(pinacolato) diboron, potassium acetate, PdCl₂dppf, and dppf in a solvent such as dioxane is heated at a temperature above RT, preferably at a temperature above about 50° C., and more preferably at a temperature at about 80° C. to give 4,4,5,5-tetramethyl-2-(1-methyl(4-1,2,5,6-tetrahydropyridyl))-1,3,2-dioxaborolane 130. The substituted aniline 131 is formed from the 1,3,2-dioxaborolane 130 such as with treatment with an amine in the presence of PdCl₂dppf and base, such as K₂CO₃, in a solvent such as DMF at a temperature above RT, preferably at a temperature above about 50° C., and more preferably at a temperature at about 80° C.

Substituted anilines can be prepared by the process outlined in Scheme 38. 4-Cyano-4-phenylpiperidine hydrochloride 132 is treated with base, such as KOH, at a temperature above RT, preferably at a temperature above about 100° C., and more preferably at a temperature at about 160° C., to provide the phenyl piperidine 133. Alkylation of the phenyl piperidine 133, such as with formaldehyde and NaCNBH₃ in a solvent such as CH₃CN, with sufficient acid to maintain the reaction pH near 7, to provide the alkylated piperidine 134. Nitration of the phenylpiperidine 134, such as with H₂SO₄ and fuming HNO₃ at a temperature below RT, and preferably at about 0° C., gives the nitro intermediate 135. Hydrogenation of the nitro intermediate 135, such as with an H₂ atmosphere in the presence of a catalyst, such as Pd/C, in the presence of a solvent, such as an alcohol, preferably MeOH, to give the amino intermediate 136.

Substituted amides can be prepared by the process outlined in Scheme 39. 3-Nitrocinnamic acid 137 is coupled with 1-methylpiperazine in the presence of EDC and a solvent such as CH₂Cl₂, at a temperature of about RT gives the carboxamide 138.

Substituted benzylamines can be prepared by the process outlined in Scheme 40. A substituted bromobenzylamine 139 where R^(2a) is a substituent described for R² is protected such as with Boc₂O in the presence of base, such as TEA in an appropriate solvent such as CH₂Cl₂. The protected bromobenzylamine 140 is alkylated, such as with 1-dimethylamino-2-propyne in the presence of catalyst, such as PdCl₂ (PPh₃)₂ bis(triphenyphosphino)-palladium chloride, and CuI, in the presence of base, such as TEA, at a temperature above RT, preferably at a temperature above about 50° C., and more preferably at a temperature at about 100° C., such as in a sealed tube, to form the propynylbenzylamine 141. The propynylbenzylamine is hydrogenated such as with H₂ in the presence of Pd(OH)₂ and MeOH to provide the propylbenzylamine 142. Deprotection, such as with strong acid, such as TFA, for removal of a Boc protecting group, yields the propylbenzylamine 143.

Substituted benzylamines can be prepared by the process outlined in Scheme 41. The protected bromobenzylamine 140 is alkylated, such as with propargyl alcohol in the presence of catalyst, such as PdCl₂(PPh₃), and CuI, in the presence of base, such as TEA, at a temperature above RT, preferably at a temperature above about 50° C., and more preferably at a temperature at about 100° C., such as in a sealed tube, to form the protected hydroxypropynylbenzylamine 144. The protected hydroxypropynylbenzylamine is treated with N-methylmorpholine oxide in the presence of a catalyst, such as tetrapropylammonium perruthenate, to form the aldehyde intermediate. Reductive amination, such as with the addition of morpholine and NaBH(OAc)₃ provides the morpholinyl derivative. Deprotection, such as with strong acid, such as TFA, for removal of a Boc protecting group, yields the propylbenzylamine 145.

Substituted heterocycles may be prepared by the method found in Scheme 42. Chloro-heterocycles 146 (where LG is OH) is coupled with an amine 147 at a suitable temperature, such as a temperature over about 100° C. to give the 2-substituted amino-nicotinic acid 148. The 2-substituted amino-nicotinic acid 148 is reacted with a substituted amine in the presence of a coupling reagent, such as BOP-Cl and base, such as TEA to form the 2-substituted amino-nicotinamide 149.

Alternatively, 2-chloro-nicotinoyl chloride 146 (where LG is Cl) is coupled first with R²—NH₂, such as in the presence of base, e.g., NaHCO₃, in a suitable solvent, such as IpOH or CH₂Cl₂, to form the amide 150, then coupled with a benzylamine 147 to yield the 2-substituted amino-nicotinamide 149. Where A is a pi-electron rich heterocycle, the addition of KF, such as 40% KF on alumina in IpOH, at a temperature over about 100° C., preferably about 160° C., can be used in the formation of 149 from 150.

2,3,4,4a,9,9a-Hexahydro-1H-3-aza-fluoren-6-ylamine may be prepared by the method found in Scheme 43. Nitrobenzylpyridines 151 are alkylated, such as with MeI, in the presence of TBAI and base to form the pyridinium compound 152. The pyridinium compounds 152 are halogenated, such as brominated with NBS, to form the brominated pyridinium compounds 153 which are reduced such as with NaBH₄ to form the tetrahydro-pyridines 154. Palladium catalyzed intramolecular Heck coupling followed by hydrogenation forms the hexahydro-fluorenes 156.

The starting compounds defined in Schemes 1-43 may also be present with functional groups in protected form if necessary and/or in the form of salts, provided a salt-forming group is present and the reaction in salt form is possible. If so desired, one compound of Formula I-IV can be converted into another compound of Formula I-IV or an N-oxide thereof; a compound of Formula I-IV can be converted into a salt; a salt of a compound of Formula I-IV can be converted into the free compound or another salt; and/or a mixture of isomeric compounds of Formula I-IV can be separated into the individual isomers.

N-Oxides can be obtained in a known matter by reacting a compound of Formula I-IV with hydrogen peroxide or a peracid, e.g., 3-chloroperoxy-benzoic acid, in an inert solvent, e.g., CH₂Cl₂, at a temperature between about −10-35° C., such as about 0° C.—RT.

If one or more other functional groups, for example carboxy, hydroxy, amino, or mercapto, are or need to be protected in a compound of Formula I-IV or in the synthesis of a compound of Formula I-IV, because they should not take part in the reaction, these are such groups as are usually used in the synthesis of peptide compounds, and also of cephalosporins and penicillins, as well as nucleic acid derivatives and sugars.

The protecting groups may already be present in precursors and should protect the functional groups concerned against unwanted secondary reactions, such as acylations, etherifications, esterifications, oxidations, solvolysis, and similar reactions. It is a characteristic of protecting groups that they lend themselves readily, i.e. without undesired secondary reactions, to removal, typically by solvolysis, reduction, photolysis or also by enzyme activity, for example under conditions analogous to physiological conditions, and that they are not present in the end-products. The specialist knows, or can easily establish, which protecting groups are suitable with the reactions mentioned above and hereinafter.

The protection of such functional groups by such protecting groups, the protecting groups themselves, and their removal reactions are described for example in standard reference works, such as J. F. W. McOmie, Protective Groups in Organic Chemistry, Plenum Press, London and New York (1973), in T. W. Greene, Protective Groups in Organic Synthesis, Wiley, New York (1981), in The Peptides, Volume 3 (editors: E. Gross and J. Meienhofer), Academic Press, London and New York (1981), in Methoden der Organischen Chemie (Methods of Organic Chemistry), Houben Weyl, 4^(th) edition, Volume 15/1, Georg Thieme Verlag, Stuttgart (1974), in H.-D. Jakubke and H. Jescheit, Aminosäuren, Peptide, Proteine (Amino Acids, Peptides, Proteins), Verlag Chemie, Weinheim, Deerfield Beach, and Basel (1982), and in Jochen Lehmann, Chemie der Kohlenhydrate: Monosaccharide und Derivate (Chemistry of Carbohydrates: Monosaccharides and Derivatives), Georg Thieme Verlag, Stuttgart (1974).

In the additional process steps, carried out as desired, functional groups of the starting compounds which should not take part in the reaction may be present in unprotected form or may be protected for example by one or more of the protecting groups mentioned above under “protecting groups”. The protecting groups are then wholly or partly removed according to one of the methods described there.

Salts of a compound of Formula I-IV with a salt-forming group may be prepared in a manner known per se. Acid addition salts of compounds of Formula I-IV may thus be obtained by treatment with an acid or with a suitable anion exchange reagent. A salt with two acid molecules (for example a dihalogenide of a compound of Formula I) may also be converted into a salt with one acid molecule per compound (for example a monohalogenide); this may be done by heating to a melt, or for example by heating as a solid under a high vacuum at elevated temperature, for example from about 130° C. to about 170° C., one molecule of the acid being expelled per molecule of a compound of Formula I-IV.

Salts can usually be converted to free compounds, e.g., by treating with suitable basic agents, for example with alkali metal carbonates, alkali metal hydrogen carbonates, or alkali metal hydroxides, typically potassium carbonate or sodium hydroxide.

A compound of Formula I, wherein Z is oxygen, can be converted into the respective compound wherein Z is sulfur, for example, by using an appropriate sulfur compound, e.g. using reaction with Lawesson's reagent (2,4-bis-(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide) in a halogenated hydrocarbon, such as CH₂Cl₂, or an aprotic solvent, such as toluene or xylene, at temperatures from about 30° C. to reflux.

All process steps described here can be carried out under known reaction conditions, preferably under those specifically mentioned, in the absence of or usually in the presence of solvents or diluents, preferably such as are inert to the reagents used and able to dissolve these, in the absence or presence of catalysts, condensing agents or neutralizing agents, for example ion exchangers, typically cation exchangers, for example in the H+ form, depending on the type of reaction and/or reactants at reduced, normal, or elevated temperature, for example in the range from about −100° C. to about 190° C., preferably from about −80° C. to about 150° C., for example at about −80 to about 60° C., at RT, at about −20° C. to about 40° C. or at the boiling point of the solvent used, under atmospheric pressure or in a closed vessel, where appropriate under pressure, and/or in an inert atmosphere, for example under argon or nitrogen.

Salts may be present in all starting compounds and transients, if these contain salt-forming groups. Salts may also be present during the reaction of such compounds, provided the reaction is not thereby disturbed.

In certain cases, typically in hydrogenation processes, it is possible to achieve stereoselective reactions, allowing for example easier recovery of individual isomers.

The solvents from which those can be selected which are suitable for the reaction in question include for example water, esters, typically lower alkyl-lower alkanoates, e.g., ethyl acetate, ethers, typically aliphatic ethers, e.g., diethyl ether, or cyclic ethers, e.g., THF, liquid aromatic hydrocarbons, typically benzene or toluene, alcohols, typically MeOH, EtOH or 1-propanol, IpOH, nitrites, typically CH₃CN, halogenated hydrocarbons, typically CH₂Cl₂, acid amides, typically DMF, bases, typically heterocyclic nitrogen bases, e.g. pyridine, carboxylic acids, typically lower alkanecarboxylic acids, e.g., AcOH, carboxylic acid anhydrides, typically lower alkane acid anhydrides, e.g., acetic anhydride, cyclic, linear, or branched hydrocarbons, typically cyclohexane, hexane, or isopentane, or mixtures of these solvents, e.g., aqueous solutions, unless otherwise stated in the description of the process. Such solvent mixtures may also be used in processing, for example in chromatography.

The invention relates also to those forms of the process in which one starts from a compound obtainable at any stage as a transient and carries out the missing steps, or breaks off the process at any stage, or forms a starting material under the reaction conditions, or uses said starting material in the form of a reactive derivative or salt, or produces a compound obtainable by means of the process according to the invention and processes the said compound in situ. In the preferred embodiment, one starts from those starting materials which lead to the compounds described above as preferred.

The compounds of Formula I-IV, including their salts, are also obtainable in the form of hydrates, or their crystals can include for example the solvent used for crystallization (present as solvates).

New starting materials and/or intermediates, as well as processes for the preparation thereof, are likewise the subject of this invention. In the preferred embodiment, such starting materials are used and reaction conditions so selected as to enable the preferred compounds to be obtained.

Starting materials of the invention, are known, are commercially available, or can be synthesized in analogy to or according to methods that are known in the art.

For example, amine 1 can be prepared by reduction of the corresponding nitro. The reduction preferably takes place in the presence of a suitable reducing agent, such as tin(II) chloride or hydrogen in the presence of an appropriate catalyst, such as Raney nickel (then preferably the hydrogen is used under pressure, e.g. between 2 and 20 bar) or PtO₂, in an appropriate solvent, e.g. an alcohol, such as MeOH. The reaction temperature is preferably between about 0° C. and about 80° C., especially about 15° C. to about 30° C.

It would also be possible to reduce the nitro compound after forming the amide compound under reaction conditions analogous to those for the reduction of nitro compounds described above. This would eliminate the need to protect the free amino group as described in Scheme 1.

In the preparation of starting materials, existing functional groups which do not participate in the reaction should, if necessary, be protected. Preferred protecting groups, their introduction and their removal are described above or in the examples.

All remaining starting materials are known, capable of being prepared according to known processes, or commercially obtainable; in particular, they can be prepared using processes as described in the examples.

Compounds of the present invention can possess, in general, one or more asymmetric carbon atoms and are thus capable of existing in the form of optical isomers as well as in the form of racemic or non-racemic mixtures thereof. The optical isomers can be obtained by resolution of the racemic mixtures according to conventional processes, e.g., by formation of diastereoisomeric salts, by treatment with an optically active acid or base. Examples of appropriate acids are tartaric, diacetyltartaric, dibenzoyltartaric, ditoluoyltartaric, and camphorsulfonic acid and then separation of the mixture of diastereoisomers by crystallization followed by liberation of the optically active bases from these salts. A different process for separation of optical isomers involves the use of a chiral chromatography column optimally chosen to maximize the separation of the enantiomers. Still another available method involves synthesis of covalent diastereoisomeric molecules by reacting compounds of the invention with an optically pure acid in an activated form or an optically pure isocyanate. The synthesized diastereoisomers can be separated by conventional means such as chromatography, distillation, crystallization or sublimation, and then hydrolyzed to deliver the enantiomerically pure compound. The optically active compounds of the invention can likewise be obtained by using optically active starting materials. These isomers may be in the form of a free acid, a free base, an ester or a salt.

The compounds of this invention may contain one or more asymmetric centers and thus occur as racemates and racemic mixtures, scalemic mixtures, single enantiomers, individual diastereomers and diastereomeric mixtures. All such isomeric forms of these compounds are expressly included in the present invention.

The compounds of this invention may also be represented in multiple tautomeric forms, for example, as illustrated below:

The invention expressly includes all tautomeric forms of the compounds described herein.

The compounds may also occur in cis- or trans- or E- or Z-double bond isomeric forms. All such isomeric forms of such compounds are expressly included in the present invention. All crystal forms of the compounds described herein are expressly included in the present invention.

Substituents on ring moieties (e.g., phenyl, thienyl, etc.) may be attached to specific atoms, whereby they are intended to be fixed to that atom, or they may be drawn unattached to a specific atom, whereby they are intended to be attached at any available atom that is not already substituted by an atom other than H (hydrogen).

The compounds of this invention may contain heterocyclic ring systems attached to another ring system. Such heterocyclic ring systems may be attached through a carbon atom or a heteroatom in the ring system.

Alternatively, a compound of any of the formulas delineated herein may be synthesized according to any of the processes delineated herein. In the processes delineated herein, the steps may be performed in an alternate order and may be preceded, or followed, by additional protection/deprotection steps as necessary. The processes may further comprise use of appropriate reaction conditions, including inert solvents, additional reagents, such as bases (e.g., LDA, DIEA, pyridine, K₂CO₃, and the like), catalysts, and salt forms of the above. The intermediates may be isolated or carried on in situ, with or without purification. Purification methods are known in the art and include, for example, crystallization, chromatography (liquid and gas phase, simulated moving bed (“SMB”)), extraction, distillation, trituration, reverse phase HPLC and the like. Reactions conditions such as temperature, duration, pressure, and atmosphere (inert gas, ambient) are known in the art and may be adjusted as appropriate for the reaction.

As can be appreciated by the skilled artisan, the above synthetic schemes are not intended to comprise a comprehensive list of all means by which the compounds described and claimed in this application may be synthesized. Further methods will be evident to those of ordinary skill in the art. Additionally, the various synthetic steps described above may be performed in an alternate sequence or order to give the desired compounds. Synthetic chemistry transformations and protecting group methodologies (protection and deprotection) useful in synthesizing the inhibitor compounds described herein are known in the art and include, for example, those such as described in R. Larock, Comprehensive Organic Transformations, VCH Publishers (1989); T. W. Greene and P. G. M. Wuts, Protective Groups in Organic Synthesis, 3^(rd) edition, John Wiley and Sons (1999); L. Fieser and M. Fieser, Fieser and Fieser's Reagents for Organic Synthesis, John Wiley and Sons (1994); A. Katritzky and A. Pozharski, Handbook of Heterocyclic Chemistry, 2^(nd) edition (2001); M. Bodanszky, A. Bodanszky: The Practice of Peptide Synthesis Springer-Verlag, Berlin Heidelberg (1984); J. Seyden-Penne: Reductions by the Alumino- and Borohydrides in Organic Synthesis, 2^(nd) edition, Wiley-VCH (1997); and L. Paquette, editors, Encyclopedia of Reagents for Organic Synthesis, John Wiley and Sons (1995).

The compounds of this invention may be modified by appending appropriate functionalities to enhance selective biological properties. Such modifications are known in the art and include those which increase biological penetration into a given biological compartment (e.g., blood, lymphatic system, central nervous system), increase oral availability, increase solubility to allow administration by injection, alter metabolism and alter rate of excretion.

The following examples contain detailed descriptions of the methods of preparation of compounds of Formulas I-IV. These detailed descriptions fall within the scope, and serve to exemplify, the above-described General Synthetic Procedures which form part of the invention. These detailed descriptions are presented for illustrative purposes only and are not intended as a restriction on the scope of the invention.

Unless otherwise noted, all materials were obtained from commercial suppliers and used without further purification. Anhydrous solvents such as DMF, THF, CH₂Cl₂ and toluene were obtained from the Aldrich Chemical Company. All reactions involving air- or moisture-sensitive compounds were performed under a nitrogen atmosphere. Flash chromatography was performed using Aldrich Chemical Company silica gel (200-400 mesh, 60A) or Biotage pre-packed column. Thin-layer chromatography (TLC) was performed with Analtech gel TLC plates (250μ). Preparative TLC was performed with Analtech silica gel plates (1000-2000μ). Preparative HPLC was conducted on Beckman or Waters HPLC system with 0.1% TFA/H₂O and 0.1% TFA/CH₃CN as mobile phase. The flow rate was at 20 mL/min. and gradient method was used. ¹H NMR spectra were determined with super conducting FT NMR spectrometers operating at 400 MHz or a Varian 300 MHz instrument. Chemical shifts are expressed in ppm downfield from internal standard tetramethylsilane. All compounds showed NMR spectra consistent with their assigned structures. Mass spectra (MS) were determined on a Perkin Elmer—SCIEX API 165 electrospray mass spectrometer (positive and, or negative) or an HP 1100 MSD LC-MS with eletrospray ionization and quadrupole detection. All parts are by weight and temperatures are in Degrees centigrade unless otherwise indicated.

The following abbreviations are used: AcOH acetic acid Ac₂O acetic anhydride AIBN 2,2′-azobisisobutyronitrile Ar argon AgSO₄ silver sulfate AlCl₃ aluminum tricloride ATP adenosine triphosphate BH₃ borane Boc tert-butyloxycarbonyl Boc₂O Boc anhydride BOP—Cl bis(2-oxo-3-oxazolidinyl)phosphinic chloride Br₂ bromine BSA bovine serum albumin t-BuOH tert-butanol CAN ammonium cerium(IV) nitrate CH₃CN, AcCN acetonitrile CH₂Cl₂ dichloromethane CH₃I, MeI iodomethane, methyl iodide CCl₄ carbon tetrachloride CCl₃ chloroform CO₂ carbon dioxide Cs₂CO₃ cesium carbonate DIEA diisopropylethylamine CuI copper iodide CuCN copper cyanide DCE 1,2-dichloroethane DEAD diethyl azodicarboxylate DIEA diisopropylethylamine dppf 1,1-diphenylphosphinoferrocene DMAP 4-(dimethylamino)pyridine DMAC N,N-dimethylacetamide DMF dimethylformamide DMSO dimethylsulfoxide DTT dithiothreitol EDC, EDAC 1-(3-dimethylaminopropyl)-3- ethylcarbodiimide hydrochloride EGTA ethylene glycol-bis(β-aminoethyl ether)- N,N,N′,N′-tetraacetic acid EtOAc ethyl acetate EtOH ethanol Et₂O diethyl ether Fe iron g gram h hour HATU O-(7-azabenzotriazol-1-yl)-N,N,N′,N′- tetramethyluronium hexafluorophosphate H₂ hydrogen H₂O water HCl hydrochloric acid H₂SO₄ sulfuric acid H₂NNH₂ hydrazine HC(OEt)₃ triethylorthoformate HCHO, H₂CO formaldehyde HCO₂Na sodium formate HOAc, AcOH acetic acid HOAt 1-hydroxy-7-azabenzotriazole HOBt hydroxybenzotriazole IpOH isopropanol KF potassium fluoride K₂CO₃ potassium carbonate KHMDS potassium hexamethylsilazane KNO₃ potassium nitrate KOAc potassium acetate KOH potassium hydroxide LAH, LiAlH₄ lithium aluminum hydride LDA lithium diisopropylamide LiCl lithium chloride LiHMDS lithium hexamethyldisilazide MeOH methanol MgCl₂ magnesium chloride MgSO₄ magnesium sulfate mg milligram mL milliliter MnCl₂ manganese chloride NBS N-bromosuccinimide NMO 4-methylmorpholine, N-oxide NMP N-methylpyrrolidone Na₂SO₄ sodium sulfate Na₂S₂O₅ sodium metabisulfite NaHSO₃ sodium bisulfite NaHCO₃ sodium bicarbonate Na₂CO₃ sodium carbonate NaCl sodium chloride NaH sodium hydride NaI sodium iodide NaOH sodium hydroxide NaOMe sodium methoxide NaOEt sodium ethoxide NaCNBH₃ sodium cyanoborohydride NaBH₄ sodium borohydride NaNO₂ sodium nitrate NaBH(OAc)₃ sodium triacetoxyborohydride NH₄Cl ammonium chloride N₂ nitrogen Pd/C palladium on carbon PdCl₂(PPh₃)₂ palladium chloride bis(triphenylphosphine) PdCl₂(dppf) 1,1-bis(diphenylphosphino)ferrocene palladium chloride Pd(PPh₃)₄ palladium tetrakis triphenylphosphine Pd(OH)₂ palladium hydroxide Pd(OAc)₂ palladium acetate PMB para methoxybenzyl POCl₃ phosphorus oxychloride PPh₃ triphenylphosphine PtO₂ platinum oxide RT room temperature SiO₂ silica SOCl₂ thionyl chloride TBAI tetrabutylammonium iodide TBTU O-(1H-benzotriazol-1-yl)-N,N,N′,N′- tetramethyluronium tetrafluoroborate TEA triethylamine Tf₂NPh N-phenyltrifluoromethanesulfonimide TFA trifluoroacetic acid THF tetrahydrofuran TPAP tetrapropylammoniumperruthenate Tris-HCl Tris(hydroxymethyl)aminomethane hydrochloride salt Zn zinc

Preparation I—3-nitro-5-trifluoromethyl-phenol

1-Methoxy-3-nitro-5-trifluoromethyl-benzene (10 g, Aldrich) and pyridine-HCl (41.8 g, Aldrich) were mixed together and heated neat at 210° C. in an open flask. After 2.5 h the mixture was cooled to RT and partitioned between 1N HCl and EtOAc. The EtOAc fraction was washed with 1 N HCl (4×), brine (1×), dried with Na₂SO₄, filtered and concentrated in vacuo to form 3-nitro-5-trifluoromethyl-phenol as an off-white solid.

Preparation II—1-Boc-4-(3-nitro-5-trifluoromethyl-phenoxy)-piperidine

3-Nitro-5-trifluoromethyl-phenol (8.81 g) was dissolved in THF (76 mL). 1-Boc-4-hydroxy-piperidine (8.81 g, Aldrich) and Ph₃P (11.15 g) were added and the solution was cooled to −20° C. A solution of DEAD (6.8 mL, Aldrich) in THF (36 mL) was added dropwise, maintaining the temperature between −20 and −10° C. The reaction was warmed to RT and stirred overnight. The reaction was concentrated in vacuo and triturated with hexane. The yellow solid was removed by filtration and washed with Et₂O (25 mL), and hexane. The white filtrate was washed with 1 N NaOH (2×), brine (1×) and the hexane layer was dried over Na₂SO₄, filtered and concentrated in vacuo. The crude material was purified with flash chromatography (SiO₂, 5-10% EtOAc/hexane) to obtain 1-Boc-4-(3-nitro-5-trifluoromethyl-phenoxy)-piperidine.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         (S)-1-Boc-[2-(5-nitro-2-trifluoromethylphenoxymethyl]-pyrrolidine     -   b)         (R)-1-Boc-[2-(5-nitro-2-trifluoromethylphenoxymethyl]-pyrrolidine.     -   c) (R)         1-Boc-2-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine     -   d) 4-(2-tert-Butyl-5-nitro-phenoxymethyl)-1-methyl-piperidine.     -   e) (S)         1-Boc-2-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine     -   f) 1-Boc-3-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-azetidine.     -   g) N-Boc-[2-(5-nitro-2-pentafluoroethyl-phenoxy)-ethyl]amine.     -   h) (R) 3-(2-tert-Butyl-5-nitro-phenoxymethyl)-1-Boc-pyrrolidine.     -   i) 3-(2-tert-Butyl-5-nitro-phenoxymethyl)-1-Boc-azetidine.     -   j) (S)-1-Boc-[2-(5-nitro-2-tert-butylphenoxymethyl]-pyrrolidine     -   k) (S) 3-(2-tert-Butyl-5-nitro-phenoxymethyl)-1-Boc-pyrrolidine.     -   l) (R)-1-Boc-[2-(5-nitro-2-tert-butylphenoxymethyl)-pyrrolidine

Preparation III—1-Boc-4-(3-amino-5-trifluoromethyl-phenoxy)-piperidine

1-Boc-4-(3-nitro-5-trifluoromethyl-phenoxy)-piperidine (470 mg) was dissolved in MeOH (12 mL) and Pd/C (10 mg) was added. After sparging briefly with H₂, the mixture was stirred under H₂ for 6 H. The catalyst was removed by filtration and the MeOH solution was concentrated in vacuo to yield 1-Boc-4-(3-amino-5-trifluoromethyl-phenoxy)-piperidine as an off-white foam.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         1-Boc-2-(3-Amino-5-trifluoromethyl-phenoxymethyl)-pyrrolidine.     -   b)         2-(3-Amino-5-trifluoromethyl-phenoxymethyl)-1-methyl-pyrrolidine.     -   c) [2-(1-Methylpiperidin-4-yloxy)-pyridin-4-yl]methylamine. ESI         (M+H)=222.     -   d) (2-(2-Morpholin-4-yl-ethoxy)-pyridin-4-yl]methylamine.     -   e) [2-(2-Morpholin-4-yl-propoxy)-pyridin-4-yl]methylamine.     -   f)         [2-(1-Methyl-pyrrolidin-2-ylmethoxy)-pyridin-4-yl]methylamine.         ESI MS: (M+H)=222.     -   g) (4-Aminomethyl-pyridin-2-yl)-(3-morpholin-4-yl-propyl)-amine.         ESI MS: (M+H)=251.     -   h) 4-tert-Butyl-3-(1-methyl-piperidin-4-ylmethoxy)-phenylamine.     -   i) 4-tert-Butyl-3-(2-piperidin-1-yl-ethoxy)-phenylamine.     -   j)         3-(1-Methyl-piperidin-4-ylmethoxy)-4-pentafluoroethyl-phenylamine.     -   k)         3-(1-Isopropyl-piperidin-4-ylmethoxy)-4-pentafluoroethyl-phenylamine.     -   l) (S) 3-Oxiranylmethoxy-4-pentafluoroethyl-phenylamine.     -   m) 3-(2-Pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenylamine.     -   n) 3-(2-Piperidin-1-yl-ethoxy)-4-trifluoromethyl-phenylamine.     -   o) (S)         3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenylamine.     -   p) (R)         3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenylamine.     -   q) (R)         3-(1-Methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenylamine.     -   r) (S)         3-(1-Methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenylamine     -   s) (R) 3-Oxiranylmethoxy-4-pentafluoroethyl-phenylamine.     -   t) (R)         2-(5-Amino-2-pentafluoroethyl-phenoxy)-1-pyrrolidin-1-yl-ethanol.     -   u)         3-(1-Boc-azetidin-3-ylmethoxy)-4-pentafluoroethyl-phenylamine.     -   v) 3-(2-(Boc-amino)ethoxy)-4-pentafluoroethyl-phenylamine.     -   w) 6-Amino-2,2-dimethyl-4H-benzo[1,4]oxazin-3-one. M+H 193.2.         Calc'd 192.1.     -   x) 2,2,4-Trimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylamine.     -   y)         1-(6-Amino-2,2-dimethyl-2,3-dihydro-benzo[1,4]oxazin-4-yl)-ethanone.         M+H 221.4. Calc'd 220.3.     -   z) [2-(1-Benzhydryl-azetidin-3-yloxy)-pyridin-4-yl]-methylamine.     -   aa)         [2-(1-Methyl-piperidin-4-ylmethoxy)-pyridin-4-yl]-methylamine.         M+H 236.3. Calc'd 235.2.     -   ab)         3-(4-Boc-piperazin-1-ylmethyl)-5-trifluoromethyl-phenylamine.         M+H 360.3.     -   ac) 2-Boc-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-7-ylamine.     -   ad) 3-Morpholin-4-ylmethyl-4-pentafluoroethyl-phenylamine.     -   ae)         3-(4-Methyl-piperazin-1-ylmethyl)-4-pentafluoroethyl-phenylamine.         M+H 410.3. Calc'd 409.4.     -   af)         7-Amino-2-(4-methoxy-benzyl)-4,4-dimethyl-3,4-dihydro-2H-isoquinolin-1-one.         M+H 311.1.     -   ag) 7-Amino-4,4-dimethyl-3,4-dihydro-2H-isoquinolin-1-one.     -   ah)         (3-Amino-5-trifluoromethyl-phenyl)-(4-Boc-piperazin-1-yl)-methanone.         M+H 374.3; Calc'd 373.     -   ai)         3-(4-Boc-Piperazin-1-ylmethyl)-5-trifluoromethyl-phenylamine.     -   aj)         1-(7-Amino-4,4-dimethyl-3,4-dihydro-1H-isoquinolin-2-yl)-ethanone.         M+H 219.2.     -   ak)         {2-[2-(1-Methylpiperidin-4-yl)ethoxy]-pyridin-4-yl}-methylamine.     -   al) {2-[2-(1-Pyrrolidinyl)ethoxy]-pyridin-4-yl}-methylamine.     -   am)         {2-[2-(1-Methylpyrrolin-2-yl)ethoxy]-pyridin-4-yl}-methylamine.     -   an) (2-Chloro-pyrimidin-4-yl)-methylamine.     -   ao)         3-(1-Boc-azetidin-3-ylmethoxy)-5-trifluoromethyl-phenylamine.     -   ap) 4-tert-Butyl-3-(1-Boc-pyrrolidin-3-ylmethoxy)-phenylamine.         M+H 385.     -   aq) 4-tert-Butyl-3-(1-Boc-azetidin-3-ylmethoxy)-phenylamine.         M+Na 357.     -   ar) (S)         4-tert-Butyl-3-(1-Boc-pyrrolidin-2-ylmethoxy)-phenylamine. M+Na         371.     -   as) 3-tert-Butyl-4-(4-Boc-piperazin-1-yl)-phenylamine     -   at) 3-(1-Methyl-piperidin-4-yl)-5-trifluoromethyl-phenylamine.     -   au) 3,3-Dimethyl-2,3-dihydro-benzofuran-6-ylamine.     -   av)         3,9,9-Trimethyl-2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluoren-6-ylamine.     -   aw) 4-[1-Methyl-1-(1-methyl-piperidin-4-yl)-ethyl]-phenylamine         was prepared using EtOH as the solvent.     -   ax) 4-tert-Butyl-3-(4-pyrrolidin-1-yl-but-1-enyl)-phenylamine.     -   ay) (R)         3-(1-Boc-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenylamine.     -   az) (S)         3-(1-Boc-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenylamine.

Preparation IV—1-Boc-4-{3-[(2-fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine

1-Boc-4-(3-amino-5-trifluoromethyl-phenoxy)-piperidine (4.37 g) was dissolved in CH₂Cl₂ (100 mL) and NaHCO₃ (2.4 g, Baker) was added. 2-Fluoropyridine-3-carbonyl chloride (2.12 g) was added an the reaction was stirred at RT for 2.5 h. The reaction was filtered and concentrated in vacuo to yield a yellow foam. (30%) EtOAc/Hexane was added and 1-Boc-4-{3-[(2-fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine precipitated as an off white solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         2-Fluoro-N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   b)         N-[4-tert-Butyl-3-(2-piperidin-1-yl-ethoxy)-phenyl]-2-fluoro-nicotinamide.     -   c)         N-[3,3-Dimethyl-1-(1-methyl-piperidin-4-ylmethyl)-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide.     -   d)         N-[1-(2-Dimethylamino-acetyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide     -   e)         N-[3,3-Dimethyl-1-(2-(Boc-amino)acetyl)-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide.     -   f)         N-(4-Acetyl-2,2-dimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-2-fluoro-nicotinamide.         M+H 344.5. Calc'd 343.4.     -   g)         2-Fluoro-N-(2,2,4-trimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-nicotinamide.         M+H 316.2. Calc'd 315.1.     -   h)         N-(2,2-Dimethyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-2-fluoro-nicotinamide.         M+H 316.1. Calc'd 315.10.     -   i)         2-Fluoro-N-[3-(4-methyl-piperazin-1-ylmethyl)-5-trifluoromethyl-phenyl]-nicotinamide.         M+H 481. Calc'd 480.     -   j)         2-Fluoro-N-(2-Boc-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-7-yl)-nicotinamide.         M+H 400.     -   k)         2-Fluoro-N-[3-(4-methyl-piperazin-1-ylmethyl)-4-pentafluoroethyl-phenyl]-nicotinamide.         M+H 447.0. Calc'd 446.     -   l)         2-Fluoro-N-(3-morpholin-4-ylmethyl-4-pentafluoroethyl-phenyl]-nicotinamide.     -   m) 2-Fluoro-N-[4-iodophenyl)-nicotinamide.     -   n)         2-Fluoro-N-(4,4-dimethyl-1-oxo-1,2,3,4-tetrahydro-isoquinolin-7-yl)-nicotinamide.         M+H 314.0, Calc'd 311.     -   o)         2-Fluoro-N-[3-(4-Boc-piperazine-1-carbonyl)-5-trifluoromethyl-phenyl]-nicotinamide.         M+H 495.     -   p)         2-Fluoro-N-[3-(4-Boc-piperazin-1-ylmethyl)-5-trifluoromethyl-phenyl]-nicotinamide.         M+H 483.3; Calc'd 482.     -   q)         N-(2-Acetyl-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-7-yl)-2-fluoro-nicotinamide.         M+H 430.0.     -   r)         N-[3,3-Dimethyl-1-(1-methyl-piperidin-4-yl)-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide.         M+H 383.2; Calc'd 382.5.     -   s) N-(4-tert-Butylphenyl)-2-fluoronicotinamide.     -   t) N-(4-Trifluoromethylphenyl)-2-fluoronicotinamide.     -   u)         2-Fluoro-N-[3-(1-Boc-azetidin-3-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide.         M−H 468.2; Calc'd 469.16.     -   v)         2-Fluoro-N-[3-(1-Boc-azetidin-3-ylmethoxy)-4-tert-butyl-phenyl]-nicotinamide.     -   w) (S)         N-[4-tert-Butyl-3-(1-Boc-pyrrolidin-2-ylmethoxy)-phenyl]-2-fluoro-nicotinamide.         M+Na 494.     -   x)         N-[3-(1-Methyl-piperidin-4-yl)-5-trifluoromethyl-phenyl]-2-fluoro-nicotinamide         was prepared with K₂CO₃. instead of NaHCO₃.     -   y) N-(3-Bromo-5-trifluoromethyl-phenyl)-2-fluoro-nicotinamide.     -   z)         2-Fluoro-N-(3,9,9-trimethyl-2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluoren-6-yl)-nicotinamide.     -   aa)         2-Fluoro-N-{4-[1-methyl-1-(1-methyl-piperidin-4-yl)-ethyl]-phenyl}-nicotinamide     -   ab)         N-[3,3-Dimethyl-1-(1-Boc-piperidin-4-ylmethyl)-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide.

Preparation V—1-Boc-4-{3-[(2-chloro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine

1-Boc-4-{3-[(2-chloro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine was prepared from 1-Boc-4-(3-amino-5-trifluoromethyl-phenoxy)-piperidine and 2-chloropyridine-3-carbonyl chloride by a procedure similar to that described in the preparation of 1-Boc-4-{3-[(2-fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) N-(4-tert-Butyl-3-nitro-phenyl)-2-chloro-nicotinamide.     -   b)         2-Chloro-N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   c)         2-Chloro-N-[3-(3-morpholin-4-yl-propyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   d)         2-Chloro-N-[3-(1-methylpiperidin-4-yl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   e)         2-Chloro-N-[3-(1-methyl-piperidin-4-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide.     -   f)         2-Chloro-N-[3-(1-isopropyl-piperidin-4-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide.     -   g) (S)         2-Chloro-N-[4-(oxiranylmethoxy)-3-pentafluoroethyl-phenyl]-nicotinamide.     -   h)         2-Chloro-N-[3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenyl]-nicotinamide.     -   i)         2-Chloro-N-[3-(2-piperidin-1-yl-ethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide.     -   j) (R)         2-Chloro-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide.     -   k) (S)         2-Chloro-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide.     -   l) (R)         2-Chloro-N-[3-(1-methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide.     -   m) (S)         2-Chloro-N-[3-(1-methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide.     -   n) (R)         2-Chloro-N-[4-(oxiranylmethoxy)-3-pentafluoroethyl-phenyl]-nicotinamide.     -   o) (R) Acetic acid         2-{5-[(2-chloro-pyridine-3-carbonyl)-amino]-2-pentafluoroethyl-phenoxy}-1-pyrrolidin-1-yl-ethyl         ester.     -   p)         2-Chloro-N-[3-(4-methyl-piperazin-1-ylmethyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   q)         2-Chloro-N-[2-(4-methoxy-benzyl)-4,4-dimethyl-1-oxo-1,2,3,4-tetrahydro-isoquinolin-7-yl]-nicotinamide.         M+H 450.2. Calc'd 449.     -   r)         2-Chloro-N-(4,4-dimethyl-1-oxo-1,2,3,4-tetrahydro-isoquinolin-7-yl)-nicotinamide.         M+H 330.1, Calc'd 329.     -   s)         2-Chloro-N-[3-(4-Boc-piperazin-1-ylmethyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   t)         2-{3-[(2-Chloro-pyridine-3-carbonyl)-amino]-phenyl}-2-methyl-propionic         acid methyl ester. M+H 405     -   u)         N-{4-tert-Butyl-3-[2-(1-Boc-piperidin-4-yl)-ethyl]-phenyl}-2-chloro-nicotinamide.         M+Na 524. Calc'd 501.1.     -   v)         N-[3,3-Dimethyl-1,1-dioxo-2,3-dihydro-1H-benzo[d]isothiazol-6-yl]-2-chloro-nicotinamide.     -   w)         N-[1,1,4,4-Tetramethyl-1,2,3,4-tetrahydro-naphth-6-yl]-2-chloro-nicotinamide.     -   x)         2-Chloro-N-[3,3-dimethyl-2,3-dihydro-benzofuran-6-yl]-2-chloro-nicotinamide.     -   y)         2-Chloro-N-[3-(1-Boc-piperidin-4-yloxy)-5-trifluoromethyl-phenyl]-nicotinamide.     -   z)         2-Chloro-N-[3-(1-methyl-piperidin-4-ylmethyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   aa)         2-Chloro-N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-nicotinamide.     -   ab)         N-[4-tert-Butyl-3-(4-pyrrolidin-1-yl-but-1-enyl)-phenyl]-2-chloro-nicotinamide.     -   ac) (R)         2-Chloro-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide.     -   ad) (S)         2-Chloro-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide.

Preparation VI—1-Boc-2-{3-[(2-fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxymethyl}-pyrrolidine

1-Boc-2-{3-[(2-Fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxymethyl}-pyrrolidine was prepared from 1-Boc-2-(3-amino-5-trifluoromethyl-phenoxymethyl)-pyrrolidine by a procedure similar to that described in the preparation of 1-Boc-4-{3-[(2-fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine.

Preparation VII—2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine

1-Boc-2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine (2.35 g) was dissolved in CH₂Cl₂ (60 mL) and TFA (20 mL) was added. After stirring for 1 h at RT, the mixture was concentrated in vacuo to yield 2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine as an oil that solidified upon standing. The material was used as is without further purification.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         (4-Aminomethyl-pyrimidin-2-yl)-(3-morpholin-4-yl-propyl)-amine.     -   b)         (4-Aminomethyl-pyrimidin-2-yl)-[2-(1-methyl-pyrrolidin-2-yl)-ethyl]-amine.

Preparation VIII—1-methyl-2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine

2-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine (6 mmol) was dissolved in CH₃CN (20 mL) and formaldehyde (2.4 mL, 37% aqueous) was added. NaBH₃CN (607 mg) was added, an exotherm was observed. The pH is monitored every 15 min and adjusted to ˜7 with AcOH. After 45 min, the mixture was concentrated in vacuo and the residue is dissolved in EtOAc, washed with 6N NaOH, 1 N NaOH, and 2 N HCl (3×). The acid washings were combined, adjusted to ˜pH 10 with solid Na₂CO₃ and extracted with EtOAc (2×). The EtOAc fractions were combined, dried with Na₂SO₄, and purified with flash chromatography (SiO₂, 95:5:0.5 CH₂Cl₂:MeOH:NH₄OH) to afford 1-methyl-2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 2-(1-Methylpiperidin-4-yl)-ethanol.     -   b)         2-{3-[(2-Fluoro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxymethyl}-1-methylpyrrolidine.

Preparation IX—4-tert-butyl-3-nitro-phenylamine

A mixture of 1,3-dinitro-4-tert-butylbenzene (10.0 g) in H₂O (56 mL) was heated to reflux. A mixture of Na₂S (21.42 g) and sulfur (2.85 g) in H₂O (34 mL) was added over 1 h via an addition funnel. The reaction maintained at reflux for 1.5 h then cooled to RT and extracted with EtOAc. The organic extracts were combined and washed with H₂O, brine, dried over MgSO₄ and concentrated in vacuo to afford 4-tert-butyl-3-nitro-phenylamine which was used as is without further purification.

Preparation X—N-(3-bromo-5-trifluoromethyl-phenyl)-acetamide

3-Bromo-5-(trifluoromethyl)phenylamine (5 g, Alfa-Aesar) was dissolved in AcOH (140 mL) and Ac₂O (5.9 mL, Aldrich) was added. The reaction was stirred at RT overnight. The mixture was added slowly to H₂O (˜700 mL) forming a white precipitate. The solid was isolated by filtration, washed with H₂O and dried under vacuum to yield N-(3-bromo-5-trifluoromethyl-phenyl)-acetamide.

Preparation XI—N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide

Allylpiperidine (1.96 g, Lancaster) was degassed under vacuum, dissolved in 0.5 M 9-BBN in THF (31.2 mL, Aldrich), and heated to reflux for 1 h, then cooled to RT. PD(dppf)Cl₂/CH₂Cl₂ was added to a degassed mixture of N-(3-bromo-5-trifluoromethyl-phenyl)-acetamide, K₂CO₃ (9.8 g) DMF (32.1 mL and H₂O (3 mL). The allyl piperidine solution was added heated to 60° C. for 3 h. After cooling to RT and reheating at 60° C. for 6 h, the mixture was cooled to RT and poured into H₂O. The mixture was extracted with EtOAc (2×), and the EtOAc portion was washed with 2 N HCl (2×) and brine. The aqueous phases were combined and the pH was adjusted to ˜11 with NaOH (15%) forming a cloudy suspension. The cloudy suspension was extracted with EtOAc (2×) and the EtOAc portion was dried with Na₂SO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography (SiO₂, 95:5:0.5 CH₂Cl₂:MeOH:NH₄OH) to afford N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide as a brown oil that solidified under vacuum.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) N-(3-Morpholin-4-ylpropyl-5-trifluoromethyl-phenyl)-acetamide         from 4-allyl-morpholine.     -   b)         N-(3-(1-methylpiperdin-4-ylmethyl-5-trifluoromethyl-phenyl)-acetamide         from 1-Methyl-4-methylene-piperidine.

Preparation XII—3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenylamine

N-[3-(3-Piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide (1.33 g) was dissolved in EtOH (40 mL) and 12 N HCl (40 mL) was added. After stirring overnight at 70° C. and RT, the mixture was concentrated in vacuo, affording 3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenylamine as a brown oil.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 3,3-Dimethyl-6-nitro-2,3-dihydro-1H-indole. M+H 193.1; Calc'd         192.2.     -   b)         3-(1-Methyl-piperidin-4-ylmethyl)-5-trifluoromethyl-phenylamine.     -   c) 3-Morpholin-4-ylmethyl-5-trifluoromethyl-phenylamine.

Preparation XIII—3,3-Dimethyl-6-nitro-1-piperidin-4-ylmethyl-2,3-dihydro-1H-indole

3,3-Dimethyl-1-(1-Boc-piperidin-4-ylmethyl)-6-nitro-2,3-dihydro-1H-indole was dissolved in HCl/EtOAc and stirred for 2 h. The mixture was concentrated in vacuo and partitioned between 1,2-dichloroethane and 1N NaOH. The organic layer was removed, washed with brine, dried (Na₂SO₄) and filtered. The material was used without further purification.

Preparation XIV—N-[3-(3-morpholin-4-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide

N-[3-(3-Morpholin-4-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide was prepared from allyl morpholine and N-(3-bromo-5-trifluoromethyl-phenyl)-acetamide similar to that described in the preparation of N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide.

Preparation XV—3-(3-morpholin-4-yl-propyl)-5-trifluoromethyl-phenylamine

3-(3-Morpholin-4-yl-propyl)-5-trifluoromethyl-phenylamine was prepared from N-[3-(3-morpholin-4-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide similar to that described in the preparation of 3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenylamine.

Preparation XVI—1-methyl-4-methylene-piperidine

Ph₃PCH₃I (50 g, Aldrich) was suspended in Et₂O (20 mL) and butyllithium (77.3 mL, 1.6 M in hexanes, Aldrich) was added dropwise. The reaction was stirred for 2 h at RT then 1-methylpiperidone (12.3 mL, Aldrich) was added slowly. The mixture was stirred at RT overnight. The solid was removed by filtration, the volume was reduced to ˜400 mL and additional solid was removed by filtration. The Et₂O was washed with H₂O (2×) and 2 N HCl (4×). The pH of the acid washings was adjusted to ˜11 with 6 N NaOH, then they were extracted with CH₂Cl₂ (4×). The CH₂Cl₂ washings were dried over Na₂SO₄ and concentrated cold in vacuo to provide 1-methyl-4-methylene-piperidine which was used as is.

Preparation XVII—N-[3-(1-methylpiperidin-4-yl)-5-trifluoromethyl-phenyl]-acetamide

N-[3-(1-Methylpiperidin-4-yl)-5-trifluoromethyl-phenyl]-acetamide was prepared from 1-methyl-4-methylene-piperidine and N-(3-bromo-5-trifluoromethyl-phenyl)-acetamide similar to that described in the preparation of N-[3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenyl]-acetamide.

Preparation XVIII—3-(1-methylpiperidin-4-yl)-5-trifluoromethyl-phenylamine

3-(1-Methylpiperidin-4-yl)-5-trifluoromethyl-phenylamine was prepared from N-[3-(1-methylpiperidin-4-yl)-5-trifluoromethyl-phenyl]-acetamide similar to the procedure described in the preparation of 3-(3-piperidin-1-yl-propyl)-5-trifluoromethyl-phenylamine.

Preparation XIX—2-(1-methylpiperidin-4-yloxy)-4-pyridylcarbonitrile

4-Hydroxy-1-methylpiperidine (25.4 g) was dissolved in THF (50 mL) in a 100 mL r.b. flask. NaH/mineral oil mixture (9.58 g) was slowly added to the flask and stirred for 20 min. 2-Chloro-4-cyanopyridine was added to the mixture and stirred at RT until completion. Diluted mixture with EtOAc and added H₂O to quench mixture, then transferred contents to a sep. funnel. The organic phase was collected while the aqueous phase was washed two times with EtOAc. The combined organics were dried over Na₂SO₄, filtered, then concentrated in vacuo. Then redissolved mixture in CH₂Cl₂, 10% HCl (300 mL) was added and the mixture was transferred to sep. funnel. The org. was extracted, while EtOAc along with 300 mL 5 N NaOH was added to the sep. funnel. The organic phases were collected, dried over Na₂SO₄, filtered and concentrated in vacuo affording 2-(1-methylpiperidin-4-yloxy)-4-pyridylcarbonitrile as a brown solid. ESI (M+H)=218.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 2-(1-methylpiperidin-4-ylmethoxy)-4-pyridylcarbonitrile. M+H         232.1. Calc'd 231.1.     -   b) 2-(1-Benzhydryl-azetidin-3-yloxy)-4-pyridylcarbonitrile. M+H         342.2. Calc'd 341.2.     -   c) 2-(1-methylpiperidin-4-ylethoxy)-4-pyridylcarbonitrile.     -   d) 2-(1-pyrrolidinylethoxy)-4-pyridylcarbonitrile.     -   e) 2-(1-methylpyrrolin-2-ylethoxy)-4-pyridylcarbonitrile.     -   f) 2-[2-(1-Boc-azetidin-3-yl)-ethoxy]-4-pyridylcarbonitrile.

Preparation XX—[2-(1-methylpiperidin-4-yloxy)-pyridin-4-yl]methylamine bis hydrochloride

[2-(1-Methylpiperidin-4-yloxy)-pyridin-4-yl]methylamine was diluted with Et₂O (50 mL) and 1M HCl/Et₂O (47 mL) was added. The vessel was swirled until precipitate formed.

Preparation XXI—2-(2-morpholin-4-yl-ethoxy)-4-pyridylcarbonitrile

2-(2-Morpholin-4-yl-ethoxy)-4-pyridylcarbonitrile was prepared from 2-chloro-4-cyanopyridine and 2-morpholin-4-yl-ethanol by a procedure similar to that described in the preparation of 2-(1-methylpiperidin-4-yloxy)-4-pyridylcarbonitrile. The HCl salt was prepared similar to that described for [2-(1-methylpiperidin-4-yloxy)-pyridin-4-yl]methylamine bis hydrochloride.

Preparation XXII—2-morpholin-4-yl-propanol

LAH powder (1.6 g) was added to a flask while under N₂ atmosphere, immediately followed by THF (50 mL). The mixture was chilled to 0° C., methyl 2-morpholin-4-yl-propionate (5 g) was added dropwise to the reaction mixture and stirred at 0° C. After 1 h, the mixture was worked up by adding H₂O (44 mL), 2N NaOH (44 mL), then H₂O (44 mL, 3×). After 30 min of stirring, the mixture was filtered through Celite® and the organic portion was concentrated in vacuo providing 2-morpholin-4-yl-propanol as a colorless oil.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) (1-Methyl-piperidin-4-yl)-methanol. M+H 130.2. Calc'd 129.1.

Preparation XXIII—2-(2-morpholin-4-yl-propoxy)-4-pyridylcarbonitrile

2-(2-Morpholin-4-yl-propoxy)-4-pyridylcarbonitrile was prepared from 2-chloro-4-cyanopyridine and 2-morpholin-4-yl-propanol by a procedure similar to that described in the preparation of 2-(1-methylpiperidin-4-yloxy)-4-pyridylcarbonitrile.

Preparation XXIV—2-(1-Methyl-pyrrolidin-2-ylmethoxy)-4-pyridylcarbonitrile

2-(1-Methyl-pyrrolidin-2-ylmethoxy)-4-pyridylcarbonitrile was prepared from 2-chloro-4-cyanopyridine and 1-methyl-pyrrolidin-2-ylmethanol by a procedure similar to that described in the preparation of 2-(1-methylpiperidin-4-yloxy)-4-pyridylcarbonitrile. ESI MS: (M+H)=218.

Preparation XXV—2-(3-morpholin-4-yl-propylamino)-4-pyridylcarbonitrile

To a flask charged with 2-chloro-4-cyanopyridine (2.0 g), was added the aminopropyl morpholine (2.11 mL). The mixture was heated to 79° C. for 5 h and stirred. After 5 h the reaction was incomplete. The mixture was then heated at 60° C. overnight. The crude compound was purified on silica gel (1-5% MeOH/CH₂Cl₂ gradient). ESI MS: (M+H)=247, (M−H)=245.

Preparation XXVI—5-Nitro-2-pentafluoroethylphenol

Combined 2-methoxy-4-nitro-1-pentafluoroethylbenzene (9.35 g) and pyridine HCl in a round bottom flask and heated at 210° C. for 1 h then cooled to RT. The mixture was diluted with EtOAc and 2N HCl (>500 mL) until all residue dissolved. The organic layer was removed, washed with 2 N HCl (2×) and concentrated in vacuo. The residue was dissolved in hexanes and Et₂O, washed with 2 N HCl, then brine. Dried organic layer over Na₂SO₄, filtered, concentrated in vacuo and dried under high vacuum to provide 5-nitro-2-pentafluoromethylphenol.

Preparation XXVII—2-tert-Butyl-5-nitro-aniline

To H₂SO₄ (98%, 389 mL) in a 500 mL 3-neck flask was added 2-tert-butyl aniline (40.6 mL). The reaction was cooled to −10° C. and KNO₃ in 3.89 g aliquots was added every 6 min for a total of 10 aliquots. Tried to maintain temperature at −5° C. to −10° C. After final addition of KNO₃, stirred the reaction for five min then it was poured onto ice (50 g). The black mix was diluted with H₂O and extracted with EtOAc. The aqueous layer was basified with solid NaOH slowly then extracted with EtOAc (2×). The combined organic layers were washed with 6 N NaOH and then with a mix of 6 N NaOH and brine, dried over Na₂SO₄, filtered and concentrated in vacuo to obtain crude 2-tert-butyl-5-nitro-aniline as a dark red-black oil which solidified when standing at RT. The crude material was triturated with about 130 mL hexanes. After decanting the hexanes, the material was dried to obtain a dark-red black solid.

Preparation XXVIII—2-tert-Butyl-5-nitrophenol

In a 250 mL round bottom flask, 20 mL concentrated H₂SO₄ was added to 2-tert-butyl-5-nitro-aniline (7.15 g) by adding 5 mL aliquots of acid and sonicating with occasional heating until all of the starting aniline went into solution. H₂O (84 mL) was added with stirring, then the reaction was cooled to 0° C. forming a yellow-orange suspension. A solution of NaNO₂ (2.792 g) in H₂O (11.2 mL) was added dropwise to the suspension and stirred for 5 min. Excess NaNO₂ was neutralized with urea, then the cloudy solution was transferred to 500 mL 3-necked round bottom flask then added 17 mL of 1:2 H₂SO₄:H₂O solution, and heated at reflux. Two additional 5 mL aliquots of 1:2 H₂SO₄:H₂O solution, a 7 mL aliquot of 1:2 H₂SO₄:H₂O solution and another 10 mL of 1:2 H₂SO₄:H₂O were added while heating at reflux. The mixture was cooled to RT forming a black layer floating on top of the aqueous layer. The black layer was diluted with EtOAc (300 mL) and separated. The organic layer was washed with H₂O then brine, dried over Na₂SO₄ and concentrated in vacuo. Crude oil was purified on silica gel column with 8% EtOAc/Hexanes. Upon drying under vacuum, the 2-tert-butyl-5-nitrophenol was isolated as a brown solid.

Preparation XXIX—1-methylpiperidine-4-carboxylic acid ethyl ester

Piperidine-4-carboxylic acid ethyl ester (78 g) was dissolved in MeOH (1.2 L) at RT then formaldehyde (37%, 90 mL) and acetic acid (42 mL) were added and stirred for 2 h. The mixture was cooled to 0° C., NaCNBH₃ (70 g) was added, and the mix was stirred for 20 min at 0° C., then overnight at RT. The mixture was cooled to 0° C. then quenched with 6N NaOH. The mixture was concentrated in vacuo to an aqueous layer, which was extracted with EtOAc (4×), brine-washed, dried over Na₂SO₄, and concentrated in vacuo to provide 1-methylpiperidine-4-carboxylic acid ethyl ester.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) (1-Methyl-piperidin-4-yl)-methanol. M+H 130.2. Calc'd 129.1.

Preparation XXX—N-[4-tert-Butyl-3-(1-methyl-piperidin-4-ylmethoxy)-phenyl]-2-chloro-nicotinamide

N-[4-tert-Butyl-3-(1-methyl-piperidin-4-ylmethoxy)-phenyl]-2-chloro-nicotinamide was prepared from 4-tert-butyl-3-(1-methyl-piperidin-4-ylmethoxy)-phenylamine by a procedure similar to that described in the preparation of 1-Boc-4-{3-[(2-chloro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine.

Preparation XXXI—1-[2-(2-tert-Butyl-5-nitro-phenoxy)-ethyl]-piperidine

To 2-tert-butyl-5-nitrophenol (1.01 g) and K₂CO₃ (1.72 g) was added acetone (35 mL) and H₂O (10.5 mL), then 1-(2-chloroethyl)piperidine HCl (1.909 g) and TBAI (153 mg). The mixture was stirred at reflux overnight. Additional K₂CO₃ (850 mg) and 1-(2-chloroethyl)-piperidine HCl (950 mg) were added and the mixture was heated at reflux for 6 h. The mixture was concentrated in vacuo to an aqueous layer which was acidified with 2 N HCl and extracted with EtOAc. The aqueous layer was basified with 6N NaOH and washed with CH₂Cl₂ (3×). The combined organic layers were washed with brine/1N NaOH and dried over Na₂SO₄. Washed the EtOAc layer with 2N NaOH/brine and dried over Na₂SO₄. The crude material was purified by silica gel column chromatography with 15% EtOAc/Hexanes to yield 1-[2-(2-tert-butyl-5-nitro-phenoxy)-ethyl]-piperidine as a light tan solid. (M+1)=307.3.

Preparation XXXII—1-Boc-Piperidine-4-carboxylic acid ethyl ester

To a stirred solution of piperidine-4-carboxylic acid ethyl ester (23.5 g) in EtOAc (118 mL) at 0° C. was added dropwise Boc₂O in EtOAc (60 mL). The reaction was warmed to RT and stirred overnight. Washed reaction with H₂O, 0.1 N HCl, H₂O, NaHCO₃ and brine. The organic layer was dried over Na₂SO₄, filtered and concentrated in vacuo. The liquid was dried under vacuum to provide 1-Boc-piperidine-4-carboxylic acid ethyl ester.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) N-Boc-(2-chloropyrimidin-4-yl)-methylamine.     -   b) 1-(2-tert-Butyl-4-nitrophenyl)-4-Boc-piperazine.     -   c) 1-Boc-azetidine-3-carboxylic acid     -   d) 1-Boc-4-Hydroxymethyl-piperidine using TEA.

Preparation XXXIII—1-Boc-4-hydroxymethyl-piperidine

1-Boc-4-Hydroxymethyl-piperidine was prepared from 1-Boc-piperidine-4-carboxylic acid ethyl ester by a procedure similar to that described in the preparation of 2-morpholin-4-yl-propanol.

Preparation XXXIV—1-Boc-4-Methylsulfonyloxymethyl-piperidine

Dissolved 1-Boc-4-hydroxymethyl-piperidine in anhydrous CH₂Cl₂ (50 mL) and TEA (4.5 mL) and cooled to 0° C. Mesyl chloride (840 μl) was added and the mixture was stirred for 15 min then at RT for 45 min. The mixture was washed with brine/1 N HCl and then brine, dried over Na₂SO₄, concentrated in vacuo and dried under high vacuum to provide 1-Boc-4-methylsulfonyloxymethyl-piperidine as a yellow orange thick oil.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 1-Boc-3-methylsulfonyloxymethyl-azetidine.

Preparation XXXV—1-Boc-4-(3-nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine

To a slurry of 60% NaH suspension in DMF (30 mL) at RT added a solution of 5-nitro-2-pentafluoroethyl-phenol (3.6 g) in 5 mL DMF. The dark red mixture was stirred at RT for 10 min then added a solution of 1-Boc-4-methylsulfonyloxymethyl-piperidine (3.1 g) in 5 mL DMF. The reaction was stirred at 60° C. and 95° C. After 1 h, added 2.94 g K₂CO₃ and stirred overnight at 105° C. After cooling to RT, the reaction was diluted with hexanes and 1 N NaOH. Separated layers, and washed organic layer with 1 N NaOH and with brine, dried over Na₂SO₄, filtered and concentrated in vacuo. Purification with silica gel column chromatography with 8% EtOAc/Hexanes yielded 1-Boc-4-(3-nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine as a light yellow thick oil.

Preparation XXXVI—4-(3-nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine

4-(3-Nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine was prepared from 1-Boc-4-(3-nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine by a procedure similar to that described in the preparation of 2-(3-nitro-5-trifluoromethyl-phenoxymethyl)-pyrrolidine.

Preparation XXXVII—1-methyl-4-(3-nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine

4-(3-Nitro-6-pentafluoroethyl-phenoxymethyl)-piperidine (316.5 mg) was dissolved in 2.7 mL CH3CN, then added 37% formaldehyde/H₂O (360 μL) and then NaBH₃CN (90 mg). Upon addition of NaCNBH₃ the reaction exothermed slightly. The reaction was stirred at RT and pH was maintained at ˜7 by addition of drops of glacial AcOH. After about 1 h, the mixture was concentrated in vacuo, treated with 8 mL 2 N KOH and extracted two times with 10 mL Et₂O. The organic layers were washed with 0.5 N KOH and then the combined organic layers were extracted two times with 1 N HCl. The aqueous layer was basified with solid KOH and extracted two times with Et₂O. This organic layer was then washed with brine/1N NaOH, dried over Na₂SO₄, filtered, concentrated in vacuo and dried under high vacuum to give pure compound.

Preparation XXXVIII—1-Isopropyl-4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine

Dissolved 4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine (646 mg) in 1,2-dichloroethane (6.4 mL), then added acetone (136 μL), NaBH(OAc)₃ (541 mg) and finally AcOH (105 μL). Stirred the cloudy yellow solution under N₂ at RT overnight. Added another 130 μL acetone and stirred at RT over weekend. Quenched the reaction with 30 mL N NaOH/H₂O and stirred 10 min. Extracted with Et₂O and the organic layer was brine-washed, dried over Na₂SO₄, filtered and concentrated in vacuo. Dried under high vacuum for several h to obtain 1-isopropyl-4-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-piperidine as a yellow orange solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         3,3-Dimethyl-1-(1-methyl-piperidin-4-yl)-6-nitro-2,3-dihydro-1H-indole         was prepared using 1-methyl-piperidin-4-one. M+H 290; Calc'd         289.4.     -   b)         3,3-Dimethyl-1-(1-Boc-piperidin-4-ylmethyl)-6-nitro-2,3-dihydro-1H-indole         using 1-Boc-4-formyl-piperidine.

Preparation XXXIX—3,3-Dimethyl-1-(1-methyl-piperidin-4-ylmethyl)-6-nitro-2,3-dihydro-1H-indole

3,3-Dimethyl-1-piperidin-4-ylmethyl-6-nitro-2,3-dihydro-1H-indole was treated with an excess of formaldehyde and NaBH(OAc)₃ and stirred overnight at RT. The reaction was quenched with MeOH and concentrated in vacuo. The residue was partitioned between EtOAc and 1 N NaOH. The organic layer was removed, washed with brine, dried (Na₂SO₄), filtered and concentrated to provide the compound.

Preparation XL—(S) 2-(5-Nitro-2-pentafluoroethyl-phenoxymethyl)-oxirane

Combined 5-nitro-2-pentafluoromethylphenol (2.69 g), DMF (25 mL) K₂CO₃ (3.03 g) and (S) toluene-4-sulfonic acid oxiranyl-methyl ester (2.27 g) and stirred the mixture at 90° C. After about 4 h, the mix was cooled, diluted with EtOAc, washed with H₂O, 1 N NaOH (2×), 1 N HCl and then with brine. Dried over Na₂SO₄, filtered and concentrated in vacuo. Purified the crude on silica gel column with 5% EtOAc/hexane and drying under high vacuum provided the (S)-2-(5-nitro-2-pentafluoroethyl-phenoxymethyl)-oxirane.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) (R)-2-(5-Nitro-2-pentafluoroethyl-phenoxymethyl)-oxirane.

Preparation XLI—(S) 2-Chloro-N-[3-(2-hydroxy-3-pyrrolidin-1-yl-propoxy)-4-pentafluoroethyl-phenyl]-nicotinamide

(S) 2-Chloro-N-[4-(2-oxiranylmethoxy-)-3-pentafluoroethyl-phenyl]-nicotinamide (1.11 g) in a sealed tube and added pyrrolidine (285 μL). Stirred after sealing tube at 60° C. After 12 h, the mix was concentrated in vacuo and purified on a silica gel column (5:95:0.5 MeOH:CH₂Cl₂:NH₄OH—8:92:1, MeOH:CH₂Cl₂:NH₄OH). Concentrated in vacuo and dried under high vacuum to obtain pure compound.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) (R)         1-(5-Nitro-2-pentafluoroethyl-phenoxy)-3-pyrrolidin-1-yl-propan-2-ol.

Preparation XLII—5-nitro-2-trifluoromethylanisole

Cooled 140 mL pyridine in a large sealable vessel to −40° C. Bubbled in trifluoromethyl iodide from a gas cylinder which had been kept in freezer overnight. After adding ICF₃ for 20 min, added 2-iodo-5-nitroanisole (24.63 g) and copper powder (67.25 g). Sealed vessel and stirred vigorously for 22 h at 140° C. After cooling to −50° C., carefully unsealed reaction vessel and poured onto ice and Et₂O. Repeatedly washed with Et₂O and H₂O. Allowed the ice—Et₂O mixture to warm to RT. Separated layers, washed organic layer with 1N HCl (3×), then brine, dried over Na₂SO₄, filtered and concentrated in vacuo. Eluted material through silica gel plug (4.5:1 Hex:CH₂Cl₂) to provide 5-nitro-2-trifluoromethylanisole.

Preparation XLIII—1-[2-(5-nitro-2-trifluoromethylphenoxy)ethyl]pyrrolidine

1-[2-(5-Nitro-2-trifluoromethylphenoxy)ethyl]-pyrrolidine was prepared from 5-nitro-2-trifluoromethyl-phenol and 1-(2-chloroethyl)pyrrolidine by a procedure similar to that described for 1-[2-(2-tert-butyl-5-nitro-phenoxy)-ethyl]-piperidine.

Preparation XLIV—1-[2-(5-Nitro-2-pentafluoroethyl-phenoxy)-ethyl]-piperidine

1-[2-(5-Nitro-2-pentafluoroethyl-phenoxy)-ethyl]-piperidine was prepared from 5-nitro-2-pentafluoroethylphenol and 1-(2-chloroethyl)piperidine by a procedure similar to that described in the preparation of 1-[2-(2-tert-butyl-5-nitro-phenoxy)-ethyl]-piperidine.

Preparation XLV—3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenylamine

3-(2-Pyrrolidin-1-yl-methoxy)-4-trifluoromethyl-phenylamine was prepared from 1-[2-(5-nitro-2-trifluoromethylphenoxy)methyl]-pyrrolidine by a procedure similar to that described in the preparation of 1-Boc-4-(3-amino-5-trifluoromethyl-phenoxy)-piperidine.

Preparation XLVI—2-Chloro-N-[3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenyl]-nicotinamide

2-Chloro-N-[3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenyl]-nicotinamide was prepared from 3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenylamine and 2-chloropyridine-3-carbonyl chloride by a procedure similar to that described in the preparation of 1-Boc-4-{3-[(2-chloro-pyridine-3-carbonyl)-amino]-5-trifluoromethyl-phenoxy}-piperidine.

Preparation XLVII—(R) Acetic acid 2-(5-nitro-2-pentafluoroethyl-phenoxy)-1-pyrrolidin-1-ylmethyl-ethyl ester

Dissolved 1-(5-nitro-2-pentafluoroethyl-phenoxy)-3-pyrrolidin-1-yl-propan-2-ol (3.5 g) in CH₂Cl₂ (15 mL), added TEA (2.55 mL) and cooled to 0° C. Acetyl chloride (781.3 μL) was added dropwise, forming a suspension. The mixture was warmed to RT and stirred for 1.5 h. Additional acetyl chloride (200 μL) was added and the mix was stirred for another h. The mixture was diluted with CH₂Cl₂ and washed with sat. NaHCO₃. The organic layer was removed, washed with brine and back extracted with CH₂Cl₂. Dried the combined organic layers over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified over silica gel column (5:94.5:0.5 MeOH:CH₂Cl₂:NH₄OH) to provide acetic acid 2-(5-nitro-2-pentafluoroethyl-phenoxy)-1-pyrrolidin-1-ylmethyl-ethyl ester as a yellow brown oil.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) (R) Acetic acid         2-(5-amino-2-pentafluoroethyl-phenoxy)-1-pyrrolidin-1-yl-methyl-ethyl         ester.     -   b)         1-(2,2-Dimethyl-6-nitro-2,3-dihydro-benzo[1,4]oxazin-4-yl)-ethanone.         M−NO₂ 206.4; Calc'd 250.1.

Preparation XLVIII—(R) 2-Chloro-N-[3-(2-hydroxy-2-pyrrolidin-1-yl-propoxy)-4-pentafluoroethyl-phenyl]-nicotinamide

(R) Acetic acid 2-{5-[(2-chloro-pyridine-3-carbonyl)-amino]-2-pentafluoroethyl-phenoxy}-1-pyrrolidin-1-yl-ethyl ester (408 mg) was dissolved in MeOH (15 mL) and NH₄OH (6 mL) was added and the mixture was stirred at RT for 6 h. The reaction was concentrated in vacuo and dried under high vacuum. The residue was purified over silica gel column (8:92:0.6 MeOH:CH₂Cl₂:NH₄OH). The purified fractions were concentrated in vacuo and dried again to provide (R)-2-chloro-N-[3-(2-hydroxy-2-pyrrolidin-1-yl-ethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide as a white foam.

Preparation XLIX—2-Dimethylamino-1-(3,3-dimethyl-6-nitro-2,3-dihydro-indol-1-yl)-ethanone

3,3-Dimethyl-6-nitro-2,3-dihydro-1H-indole (5 g) was dissolved in DMF (100 mL) and HOAt (3.89 g) dimethylamino-acetic acid (5.83 g) and EDC (3.89 g) were added. The reaction was stirred overnight. The mixture was diluted with CH₂Cl₂ (1 L) and washed with sat'd NaHCO₃ (3×200 mL). The organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified by flash chromatography (SiO₂, EtOAc to 5% MeOH/EtOAc) to afford the title compound.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         1-(3,3-Dimethyl-6-nitro-2,3-dihydro-indol-1-yl)-2-(N-Boc-amino)-ethanone.

Preparation L—1-(6-Amino-3,3-dimethyl-2,3-dihydro-indol-1-yl)-2-(N-Boc-amino)-ethanone

1-(3,3-Dimethyl-6-nitro-2,3-dihydro-indol-1-yl)-2-(N-Boc-amino)-ethanone (3.9 g) was dissolved in EtOH (30 mL) and Fe powder (3.1 g) NH₄Cl (299 mg) and H₂O (5 mL) were added. The reaction was stirred at 80° C. overnight. The reaction was filtered through Celite® and evaporated off the MeOH. The residue was partitioned between CH₂Cl₂ and sat'd NaHCO₃. The organic layer was removed, washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified by flash chromatography (SiO₂, 25% EtOAc/hexane). The purified fractions were concentrated in vacuo to afford the compound as a white powder.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         1-(6-Amino-3,3-dimethyl-2,3-dihydro-indol-1-yl)-2-dimethylamino-ethanone.     -   b)         3,3-Dimethyl-1-(1-methyl-piperidin-4-ylmethyl)-2,3-dihydro-1H-indol-6-ylamine.     -   c)         3-(4-Methyl-piperazin-1-ylmethyl)-4-pentafluoroethyl-phenylamine.         M+H 324.2. Calc'd 323.     -   d)         3,3-Dimethyl-1-(1-methyl-piperidin-4-yl)-2,3-dihydro-1H-indol-6-ylamine.         M+H 259.6; Calc'd 259.3.     -   e)         3,3-Dimethyl-1,1-dioxo-2,3-dihydro-1H-116-benzo[d]isothiazol-6-ylamine     -   f) 1,1,4,4-Tetramethyl-1,2,3,4-tetrahydro-naphth-6-ylamine.     -   g)         3,3-Dimethyl-1-(1-Boc-piperidin-4-ylmethyl)-2,3-dihydro-1H-indol-6-ylamine.

Preparation LI—2-Boc-4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-isoquinoline

4,4-Dimethyl-7-nitro-1,2,3,4-tetrahydro-isoquinoline (150 mg) was dissolved with CH₂Cl₂ (3 mL) DIEA (100 μL) DMAP (208 mg and Boc₂O (204 mg) and the mixture was stirred for 6 h at RT. The reaction was diluted with CH₂Cl₂, washed with sat'd NaHCO₃ and dried over MgSO₄, filtered and concentrated to provide the compound which was used without further purification.

The following compounds were prepared similarly to the procedure outlined above substituting Ac₂O:

-   -   a)         1-(4,4-Dimethyl-7-nitro-3,4-dihydro-1H-isoquinolin-2-yl)-ethanone.         M+H 249.3.

Preparation LII—2-Bromo-N-(4-methoxy-benzyl)-5-nitro-benzamide

PMB-amine (5.35 mL) in CH₂Cl₂ (130 mL) was slowly added to 2-bromo-5-nitro-benzoyl chloride (10.55 g) and NaHCO₃ (9.6 g) and the mixture was stirred at RT for 1 h. The mixture was diluted with CH₂Cl₂ (1 L), filtered, washed with dilute HCl, dried, filtered again, concentrated and dried under vacuum to provide the compound as a white solid. M+H 367. Calc'd 366.

Preparation LIII—2-Bromo-N-(4-methoxy-benzyl)-N-(2-methyl-allyl)-5-nitro-benzamide

To a suspension of NaH (1.22 g) in DMF (130 mL) was added 2-bromo-N-(4-methoxy-benzyl)-5-nitro-benzamide (6.2 g) in DMF (60 mL) at −78° C. The mixture was warmed to 0° C., 3-bromo-2-methyl-propene (4.57 g) was added and the mixture was stirred for 2 h at 0° C. The reaction was poured into ice H₂O, extracted with EtOAc (2×400 mL), dried over MgSO₄, filtered and concentrated to a DMF solution which was used without further purification.

Preparation LIV—of 2-(4-Methoxy-benzyl)-4,4-dimethyl-7-nitro-3,4-dihydro-2H-isoquinolin-1-one

2-Bromo-N-(4-methoxy-benzyl)-N-(2-methyl-allyl)-5-nitro-benzamide (23.4 mmol) was dissolved in DMF (150 mL) and Et₄NCl (4.25 g), HCO₂Na (1.75 g) and NaOAc (4.99 g) were added. N₂ was bubbled through the solution for 10 min, then Pd(OAc)₂ (490 mg) was added and the mixture was stirred overnight at 70° C. The mixture was extracted with EtOAc, washed with sat'd NH₄Cl, dried over MgSO₄, filtered and concentrated until the compound precipitated as a white solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 3,3-Dimethyl-6-nitro-2,3-dihydro-benzofuran was prepared from         1-bromo-2-(2-methyl-allyloxy)-4-nitro-benzene.     -   b) 3,9,9-Trimethyl-6-nitro-4,9-dihydro-3H-3-aza-fluorene was         prepared from         4-[1-(2-bromo-4-nitro-phenyl)-1-methyl-ethyl]-1-methyl-1,2,3,6-tetrahydro-pyridine.

Preparation LV—4,4-Dimethyl-7-nitro-3,4-dihydro-2H-isoquinolin-1-one

2-(4-Methoxy-benzyl)-4,4-dimethyl-7-nitro-3,4-dihydro-2H-isoquinolin-1-one (2.0 g) was dissolved in CH₃CN (100 mL) and H₂O (50 mL) and cooled to 0° C. CAN (9.64 g) was added and the reaction was stirred at 0° C. for 30 min, then warmed to RT and stirred for 6 h. The mixture was extracted with CH₂Cl₂ (2×300 mL) washed with sat'd NH₄Cl, dried over MgSO₄, filtered and concentrated. The crude material was recrystallized in CH₂Cl₂/EtOAc (1:1) to give 4,4-dimethyl-7-nitro-3,4-dihydro-2H-isoquinolin-1-one as a white solid.

Preparation LVI—4,4-Dimethyl-7-nitro-1,2,3,4-tetrahydro-isoquinoline

4,4-Dimethyl-7-nitro-3,4-dihydro-2H-isoquinolin-1-one (230 mg) was dissolved in THF (10 mL) and BH₃Me₂S (400 μL) was added and the reaction was stirred overnight at RT. The reaction was quenched with MeOH (10 mL) and NaOH (200 mg) and heating at reflux for 20 min. The mixture was extracted with EtOAc, washed with sat'd NH₄Cl, extracted with 10% HCl (20 mL). The acidic solution was treated with 5 N NaOH (15 mL), extracted with EtOAc (30 mL) dried, filtered and evaporated to give the compound as a yellow solid. M+H 207.2, Calc'd 206.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 4-Boc-2,2-dimethyl-6-nitro-3,4-dihydro-2H-benzo[1,4]oxazine.

Preparation LVII—2-Bromomethyl-4-nitro-1-pentafluoroethyl-benzene

2-Methyl-4-nitro-1-pentafluoroethyl-benzene (2.55 g) was dissolved in CCl₄ (30 mL) and AIBN (164 mg) and NBS (1.96 g) were added. The reaction was heated to reflux and stirred for 24 h. The mix was diluted with CH₂Cl₂, washed with sat'd NaHCO₃, dried over MgSO₄ and concentrated to give the compound as an oil which was used without further purification.

Preparation LVIII—1-Methyl-4-(5-nitro-2-pentafluoroethyl-benzyl)-piperazine

2-Bromomethyl-4-nitro-1-pentafluoroethyl-benzene (2.6 g) was added to N-methylpiperazine (5 mL) and stirred at RT for 3 h. The mixture was filtered and the filtrate was treated with 1-chlorobutane, extracted with 2 N HCl (100 mL). The acidic solution was treated with 5 N NaOH (6 mL) then extracted with EtOAc. The organic layer was removed, dried over MgSO₄ and concentrated to give the compound as an oil.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 4-(5-Nitro-2-pentafluoroethyl-benzyl)-morpholine.

Preparation LIX—1-Boc-4-(5-nitro-2-pentafluoroethyl-benzyl)-piperazine

2-Bromomethyl-4-nitro-1-pentafluoroethyl-benzene (2.5 g) was dissolved in CH₂Cl₂ and added to N-Boc-piperazine (2.5 g) and NaHCO₃ (1 g) and stirred at RT overnight. The mixture was diluted with CH₂Cl₂ (100 mL), washed with sat'd NH₄Cl, dried over MgSO₄, filtered and concentrated. The residue was purified by silica gel chromatography (hexane, CH₂Cl₂:hexane 2:8) to give the compound as an yellow solid.

Preparation LX—(4-Boc-piperazin-1-yl)-(3-nitro-5-trifluoromethyl-phenyl)-methanone

A mixture of 3-nitro-5-trifluoromethyl-benzoic acid (4.13 g), 4-Boc-piperazine (2.97 g), EDC (3.88 g), HOBt (2.74 g), DIEA (3.33 mL) in CH₂Cl₂ (120 mL) was stirred at RT for 3 h. The mixture was diluted with CH₂Cl₂ (100 mL), washed with sat'd NH₄Cl, dried over MgSO₄, filtered and concentrated. The residue was purified by silica gel chromatography (hexane, CH₂Cl₂:hexane 1:2) to give the compound as a white solid.

Preparation LXI—1-Boc-4-(3-nitro-5-trifluoromethyl-benzyl)-piperazine

(4-Boc-piperazin-1-yl)-(3-nitro-5-trifluoromethyl-phenyl)-methanone (403 mg) was dissolved in THF (6 mL) and BH₃Me₂S (300 μL) was added and the reaction was stirred for 3 h at 60° C. and 2 h at RT. The reaction was quenched with MeOH (5 mL) and NaOH (100 mg) and stirred at RT for 1 h. The mixture was concentrated and dissolved in CH₂Cl₂, washed with sat'd NH₄Cl/NaHCO₃, dried (MgSO₄), filtered and evaporated to give the compound as an oil. M+H 390.3.

Preparation LXII—2-Ethyl-4-aminomethyl pyridine

To a solution of 2-ethyl-4-thiopyridylamide (10 g) in MeOH (250 mL) was added Raney 2800 Nickel (5 g, Aldrich) in one portion. The mixture was stirred at RT for 2 days then at 60° C. for 16 h. The mixture was filtered, concentrated to provide the desired compound.

Preparation LXIII—N-Boc-[2-(4-morpholin-4-yl-butyl)-pyrimidin-4-ylmethyl]-amine

N-Boc-(2-chloropyrimidine)-methylamine (663 mg) and 4-(aminopropyl)morpholine (786 mg) were dissolved in MeOH and concentrated in vacuo. The residue was heated at 100° C. for 15 min, forming a solid which was dissolved in CH₂Cl₂/MeOH then concentrated again and heated 15 min more. Concentrated in vacuo and dried under high vacuum. Triturated with a small amount of IpOH and allowed to settle over a weekend. Filtered, rinsing with a small amount of IpOH to provide the compound as a white solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         (4-Bocaminomethyl-pyrimidin-2-yl)-[2-(1-methyl-pyrrolidin-2-yl)-ethyl]-amine.         M+H 336.5; Calc'd 335.45.

Preparation LXIV—2-fluoronicotinic acid

In a flame dried 3-necked round bottom flask equipped with a dropping funnel and thermometer, under N₂, THF (250 mL) was added via cannula. LDA (2M in cyclohexane, 54 mL) was added via cannula as the flask was cooled to −78° C. At −78° C., 2-fluoropyridine (8.87 mL) was added dropwise over 10 min. The reaction was stirred for 3 h. Condensation was blown off (with N₂) a few cubes of solid CO₂ and they were added to the mixture. The mixture was warmed to RT once the solution turned yellow, and it was stirred overnight. The reaction was cooled to 0° C. and the pH was adjusted to ˜2.5 with 5N HCl. The mixture was concentrated in vacuo and extracted with EtOAc. The EtOAc layer was washed with brine, dried over MgSO₄, filtered and concentrated to dryness. The resulting solid was slurried in EtOAc (100 mL), filtered, washed with cold EtOAc and dried at 50° C. for 1 h to afford 2-fluoronictinic acid. M+H 142.1; Calc'd 141.0.

Preparation LXV—4-cyano-2-methoxypyridine

Under a stream of N₂ and with cooling, Na metal (2.7 g) was added to MeOH (36 mL) with a considerable exotherm. After the Na is dissolved, a solution of 2-chloro-4-cyanopyridine (15 g) in dioxane:MeOH (1:1, 110 mL) was added via dropping funnel over a 10 min period. The reaction was heated to reflux for 3.5 h then cooled at −10° C. overnight. Solid was filtered off and the solid was washed with MeOH. The filtrate was concentrated to ˜60 mL and H₂O (60 mL) was added to redissolve a precipitate. Upon further concentration, a precipitate formed which was washed with H₂O. Further concentration produced additional solids. The solids were combined and dried in vacuo overnight at 35° C. to provide 4-cyano-2-methoxypyridine which was used as is.

Preparation LXVI—(2-methoxypyridin-4-yl)methylamine

4-Cyano-2-methoxypyridine (1.7 g) was dissolved in MeOH (50 mL) and conc. HCl (4.96 mL) was added. Pd/C (10%) was added and H₂ was added and let stand overnight. The solids were filtered through Celite® and the cake was washed with MeOH (˜250 mL). Concentration in vacuo produced an oil which was dissolved in MeOH (˜20 mL). Et₂O (200 mL) was added and stirred for 1 h. The resulting precipitate was filtered and washed with Et₂O to afford (2-methoxypyridin-4-yl)methylamine (HCl salt) as an off-white solid.

Preparation LXVII—2-(4-Amino-phenyl)-2-methyl-propionic acid methyl ester

2-Methyl-2-(4-nitro-phenyl)-propionic acid methyl ester (2.1 g) was dissolved in THF (70 mL) and AcOH (5 mL) and Zn (10 g) were added. The mixture was stirred for 1 h and filtered through Celite®. The filtrate was rinsed with EtOAc and the organics were evaporated to a residue which was purified on silica gel chromatography (40% EtOAc/hexanes) to provide the desired compound as a yellow oil. M+H 194.

Preparation LXVIII—1-(2-tert-Butyl-phenyl)-4-methyl-piperazine

2-tert-Butyl-phenylamine and bis-(2-chloro-ethyl)-methylamine were mixed together with K₂CO₃ (25 g), NaI (10 g) and diglyme (250 mL) and heated at 170° C. for 8 h. Cooled and filtered solid and evaporated solvent. Diluted with EtOAc, washed with NaHCO₃ solution, extracted twice more with EtOAc, washed with brine, dried over Na₂SO₄ and evaporated to give the compound as a dark solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 1-Bromo-2-(2-methyl-allyloxy)-4-nitro-benzene was prepared         from methallyl bromide.

Preparation LXIX 3-(1-Methyl-1,2,3,6-tetrahydro-pyridin-4-yl)-5-trifluoromethyl-phenylamine

3-(5,5-Dimethyl-[1,3,2]dioxaborinan-2-yl)-5-trifluoromethyl-phenylamine (8.8 g, 0.032 mmol)was added to trifluoromethanesulfonic acid 1-methyl-1,2,3,6-tetrahydro-pyridin-4-yl ester (7.91 g, 0.032 mmol)and 2 N Na₂CO₃ aqueous solution (25 mL) was bubbled through N₂ for 5 min. Pd(PPh₃)₄ (3.7 g, 3.2 mmol) was added and the reaction was heated to 80° C. for 16 h. The reaction was cooled to RT and diluted with Et₂O (100 mL). The mixture was filtered through Celite® and the filtrate was washed with NaHCO₃ aqueous solution (25 mL) followed by brine (25 mL). The organic phase was dried over Na₂SO₄ and concentrated in vacuo. The desired compound was isolated by passing through silica gel column chromatography (EtOAc, then (2M NH₃) in MeOH/EtOAc) to provide a yellow oil.

Preparation LXX—3,3-Dimethyl-6-nitro-2,3-dihydro-benzo[d]isothiazole 1,1-dioxide

3,3-Dimethyl-2,3-dihydro-benzo[d]isothiazole 1,1-dioxide was added to KNO₃ in H₂SO₄ cooled to 0° C. and stirred for 15 min. The reaction was warmed to RT and stirred overnight. The mix was poured into ice and extracted with EtOAc (3×), washed with H₂O and brine, dried and evaporated to give the compound which was used without further purification.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 1,1,4,4-Tetramethyl-6-nitro-1,2,3,4-tetrahydro-naphthalene

Preparation LXXI—3-(1-Methyl-1,2,3,4-tetrahydro-pyridin-4-yl)-5-trifluoromethyl-phenylamine

3-(5,5-Dimethyl-[1,3,2]dioxaborinan-2-yl)-5-trifluoromethyl-phenylamine (1.2 g) was added to trifluoro-methanesulfonic acid 1-methyl-1,2,3,6-tetrahydro-pyridin-4-yl ester (1.0 g), LiCl (500 mg, Aldrich), PPh₃ (300 mg, Aldrich) and 2 M Na₂CO₃ aqueous solution (6 mL) and was bubbled with N₂ for 5 min. Pd(PPH₃)₄ (300 mg, Aldrich) was added and the reaction was heated to 80° C. for 16 h. The reaction was cooled to RT and diluted with Et₂O (100 mL). The mixture was filtered through Celite® and the filtrate was washed with NaHCO₃ aqueous solution (25 mL) followed by brine (25 mL). The organic phase was dried over Na₂SO₄ and concentrated in vacuo. The desired compound was isolated by silica gel column chromatography (EtOAc 10% (2M NH₃) in MeOH/EtOAc) to provide yellow oil. M+H 257.2; Calc'd 256.1.

Preparation LXXII—Trifluoromethylsulfonic acid 1-methyl-1,2,3,6-tetrahydro-pyridin-4-yl ester

In a three-necked round bottom flask equipped with a thermometer and an additional funnel was placed anhydrous THF (200 mL) and 2M LDA (82.8 mL). The solution was cooled to −78° C. and a solution of 1-methyl-piperidin-4-one (20 mL) in anhydrous THF (70 mL) was added drop-wise. The reaction was warmed to −10° C. over 30 min and cooled down again to −78° C. Tf₂NPh (54.32 g) in 200 mL of anhydrous THF was added through the additional funnel over 30 min and anhydrous THF (30 mL) was added to rinse the funnel. The reaction was warmed to RT and the reaction solution was concentrated in vacuo. The residue was dissolved in Et₂O purified on neutral Al₂O₃ column chromatography (Et₂O as elutant). The compound was obtained as orange oil. (20 g)

Preparation LXXIII—3-(5,5-Dimethyl-[1,3,2]dioxaborinan-2-yl)-5-trifluoromethyl-phenylamine

N₂ was bubbled through a solution of 3-bromo-5-trifluoromethyl-phenylamine (2.38 g), 5,5,5′,5′-tetramethyl-[2,2′]bi[[1,3,2]dioxaborinanyl] (2.24 g, Frontier Scientific) and KOAc (2.92 g), dppf (165 mg, Aldrich) in anhydrous dioxane (50 mL) for 2 min. PdCl₂ (dppf) (243 mg, Aldrich) was added and the reaction was heated to 80° C. for 4 h. After cooling to RT, the mix was diluted with 50 mL of Et₂O, filtered through Celite®, and the filtrate was concentrated in vacuo. The residue was dissolved in Et₂O (100 mL), washed with sat. NaHCO₃ aqueous solution (50 mL) followed by brine (50 mL). The organic phase was dried over Na₂SO₄ and concentrated in vacuo. The residue was dissolved in 3:2 Et₂O/Hex (100 mL), filtered through Celite® and the filtrate was concentrated in vacuo to afford a dark brown semi-solid.

Preparation LXXIV—1-Boc-3-Hydroxymethyl-azetidine

A solution of 1-Boc-azetidine-3-carboxylic acid (1.6 g) and Et₃N (2 mL) in anhydrous THF (60 mL) was cooled to 0° C. Isopropyl chloroformate (1.3 g) was added via a syringe slowly; forming a white precipitate almost immediately. The reaction was stirred for 1 h at 0° C. and the precipitate was filtered out. The filtrate was cooled to 0° C. again and aqueous NaBH₄ solution (900 mg, 5 mL) was added via pipette and stirred for 1 h. The reaction was quenched with NaHCO₃ solution (50 mL) and the compound was extracted with EtOAc (200 mL). The organic phase was washed with brine (50 mL), dried over Na₂SO₄ and concentrated in vacuo. The residue was dissolved in EtOAc and passed through a short silica gel pad. Concentrating the filtrate in vacuo provided the compound as a light yellow oil.

Preparation LXXV—1-Boc-3-(3-nitro-5-trifluoromethyl-phenoxymethyl)-azetidine

A mixture of 1-Boc-3-methylsulfonyloxymethyl-azetidine (1.47 g), 3-nitro-5-trifluoromethyl-phenol (1.15 g) and K₂CO₃ (1.15 g) in DMF (20 mL) at 80° C. was stirred overnight. The reaction was cooled to RT and diluted with 25 mL of sat. NaHCO₃ and 50 mL of EtOAc. The organic phase was separated and washed with brine (25 mL), dried over Na₂SO₄ and concentrated in vacuo. The crude compound was purified by column chromatography (50% EtOAc/hex).

Preparation LXXVI—2,2-Dimethyl-6-nitro-3,4-dihydro-2H-benzo[1,4]oxazine

2,2-Dimethyl-6-nitro-4H-benzo[1,4]oxazin-3-one was added to BH₃-THF complex (Aldrich) in THF with ice cooling. The mixture was heated to reflux for 2 h then carefully diluted with 12 mL of MeOH and heated to reflux for an additional 1 h. Concentrated HCl (12 mL) was added and heated to reflux for 1 h. The mixture was concentrated and the resulting solid was suspended in a dilute aqueous solution of NaOH (1 M) and extracted with EtOAc (100 mL×4). The organic layers were washed with H₂O and dried over MgSO₄. Evaporation of solvent gave a yellow solid.

Preparation LXXVII—2,2,4-Trimethyl-6-nitro-4H-benzo[1,4]oxazin-3-one

2,2-Dimethyl-6-nitro-4H-benzo[1,4]oxazin-3-one (1.1 g) was mixed with MeI (850 mg, Aldrich), K₂CO₃ (1.38 g, Aldrich) and DMF (30 mL, Aldrich) at 40° C. for 48 h. The DMF was removed in vacuo and the residue was diluted with EtOAc (80 mL). The organic phase was washed with H₂O (50 mL), aqueous Na₂SO₃ (50 mL) and brine (50 mL). The resulting solution was dried (MgSO₄) and concentrated to provide the compound which was used as is.

Preparation LXXVIII—2-Bromo-N-(2-hydroxy-5-nitro-phenyl)-2-methyl-propionamide

2-Amino-4-nitro-phenol (3.08 g, Aldrich) was stirred with THF (30 mL, Aldrich) in an ice bath. 2-Bromo-2-methyl-propionyl bromide (2.47 mL, Aldrich) and Et₃N (2.0 g, Aldrich) was slowly added via syringe. The mixture was stirred for 45 min then poured into ice. The aqueous phase was extracted by EtOAc (50 mL×4). The organic layer was dried and concentrated. The desired compound was crystallized from EtOAc. (Chem. Pharm. Bull., 44(1):103-114 (1996)).

Preparation LXXIX—2,2-Dimethyl-6-nitro-4H-benzo[1,4]oxazin-3-one

2-Bromo-N-(2-hydroxy-5-nitro-phenyl)-2-methyl-propionamide was mixed with K₂CO₃ in 20 mL of DMF and stirred overnight at 50° C. The reaction mixture was poured into ice H2O. The precipitate was collected by filtration and washed with H₂O. The crude compound was recrystallized from EtOH.

Preparation LXXX—4-[1-(2-Bromo-4-nitro-phenyl)-1-methyl-ethyl]-1-methyl-pyridinium iodide

1-Methyl-4-[1-methyl-1-(4-nitro-phenyl)-ethyl]-pyridinium (8 g) was dissolved in glacial HOAc (10 mL) then diluted with H₂SO₄ (50 mL), then NBS (3.8 g) was added. After 1 h, additional NBS (1.2 g) was added, 30 min later another 0.5 g of NBS, then 15 min later 200 mg more NBS. After 1 h, the mixture was neutralized with NH₄OH (conc.) with ice bath cooling. The neutralized mixture was then concentrated and used as is.

Preparation LXXXI—4-[1-(2-Bromo-4-nitro-phenyl)-1-methyl-ethyl]-1-methyl-1,2,3,6-tetrahydro-pyridine

4-[1-(2-Bromo-4-nitro-phenyl)-1-methyl-ethyl]-1-methyl-pyridiniumiodide was mixed with MeOH (400 mL) and CH₂Cl₂ (200 mL), then treated with NaBH₄ (2.5 g) in portions. After stirring at RT for 2 h, the mixture was extracted with CH₂Cl₂ (300 mL×3). The CH₂Cl₂ layer was washed with brine, dried over Na₂SO₄ and concentrated in vacuo, to provide the desired compound.

Preparation LXXXII—1-Methyl-4-[1-methyl-1-(4-nitro-phenyl)-ethyl]-pyridinium iodide

4-(4-Nitro-benzyl)-pyridine (4.3 g) was mixed with MeI (4 mL, 9.12 g)/NaOH (5 N, 30 mL), Bu₄NI (150 mg) and CH₂Cl₂ (50 mL) and stirred at RT overnight. Additional MeI (2 mL) was added along with 50 mL of NaOH (5N). 6 h later, more MeI (2 mL) was added. The mixture was stirred at RT over the weekend. The mixture was cooled on ice bath and the base was neutralized by conc. HCl (aq) addition dropwise to pH 7. The compound was used as is.

Preparation LXXXIII—1-Methyl-4-(4-nitro-benzyl)-1,2,3,6-tetrahydro-pyridine

4-(4-Nitrobenzyl)pyridine (64 g) and TBAI (6 g) were dissolved in CH₂Cl₂ (500 mL) and the solution was suspended with NaOH (aq. 5N, 450 mL) in a 3L 3-necked round bottom flask. With vigorous stirring, CH3I (213 g) was added and stirred vigorously at RT for 60 h (or until blue color disappears). The reaction was quenched with dimethylamine (100 mL) and MeOH (300 mL) and stirred for 2 h. NaBH₄ (19 g) was added to the mixture in small portions. The reaction mixture was stirred for 30 min at RT, then partitioned between CH₂Cl₂/H₂O (500 mL/500 mL). The organic layer was collected and the aqueous layer was washed with CH₂Cl₂ (300 mL×3). The combined organic layers was washed with brine then concentrated in vacuo. The residue was purified on a silica wash-column (7% TEA in EtOAc). The desired fractions were combined and concentrated under vacuum to give the desired compound as a dark gray solid.

(MS: M+1=261).

Preparation LXXXIV—1-Boc-4-formylpiperidine

4A Molecular sieves were heated to 100° C. and a vacuum was applied. They were cooled to RT and purged with N2. CH₂Cl₂ (420 mL) and CH₃CN (40 mL)), NMO (40 g) and 1-Boc-4-hydroxymethylpiperidine (50 g) were added and the mix was stirred for 5 min then cooled to 15° C. TPAP (4.1 g) is added and an exotherm was observed. The reaction was maintained at RT with external cooling. The reaction was stirred at RT for 3 h, filtered, concentrated, diluted with 50% EtOAc/hexanes and purified on a silica gel plug (50% EtOAc/hexanes). The eluant fractions were concentrated to afford a yellow oil.

Preparation LXXXV—2-Chloro-4-cyanopyridine

2-Chloro-4-cyanopyridine was prepared similar to the method described by Daves et al., J. Het. Chem., 1:130-132 (1964).

Preparation LXXXVI—4-(2-tert-Butyl-5-nitro-phenyl)-but-3-en-1-ol

A mix of 1-(tert-butyl)-2-bromo-4-nitrobenzene (3.652 g), TEA (5.92 mL), 3-buten-1-ol (5.48 mL), Pd(OAc)₂ (32 mg), Pd(PPh₃)₄ (327 mg) and toluene (40 mL) was degassed with nitrogen and heated in a sealed vessel for 16 h at 120° C.

The next day, the reaction mixture was cooled to RT, filtered, and concentrated in vacuo. The crude was eluted on a silica gel column with 15% to 22% EtOAc/hexanes gradient system to yield a yellow-brown oil.

Preparation LXXXVII—4-(2-tert-Butyl-5-nitro-phenyl)-but-3-enal

4-(2-tert-Butyl-5-nitro-phenyl)-but-3-en-1-ol (1.024 g) was dissolved in 10 mL of CH₂Cl₂ and added dropwise over 5 min to a −78° C. mix of oxalyl chloride (0.645 mL), DMSO (0.583 mL), and 10 mL CH₂Cl₂. The reaction was stirred at −78° C. for 1 h, then treated with a solution of TEA (1.52 mL) in 7 mL CH₂Cl₂ and stirred at −78° C. for an additional 25 min, then warmed to −30° C. for 35 min. The reaction was treated with 50 mL of saturated aqueous NH₄Cl, diluted with H₂O and extracted with EtOAc. The organic layer was brine-washed, dried over Na₂SO₄, filtered, and concentrated in vacuo to yield a yellow oil which was used as is in Preparation LXXXVIII.

Preparation LXXXVIII—1-[4-(2-tert-Butyl-5-nitro-phenyl)-but-3-enyl]-pyrrolidine

4-(2-tert-Butyl-5-nitro-phenyl)-but-3-enal (895 mg) was dissolved in 40 mL THF, and to the solution was added pyrrolidine (0.317 mL). To the deep orange solution was added NaBH(OAc)₃ (1.151 g) and glacial AcOH (0.207 mL). The reaction was stirred at RT overnight, then treated with saturated aqueous NaHCO₃ and diluted with Et₂O and some 1N NaOH. The layers were separated, and the organic layer was extracted with aqueous 2 N HCl. The acidic aqueous layer was basified to pH>12 with 6 N NaOH, extracted with Et₂O, brine-washed, dried over Na₂SO₄, filtered, and concentrated in vacuo to provide 1-[4-(2-tert-butyl-5-nitro-phenyl)-but-3-enyl]-pyrrolidine as a orange-brown oil.

Preparation LXXXIX—N-Boc-(2-chloropyrimidin-4-yl)-methylamine

To 2-chloropyrimidine-4-carbonitrile [2.5 g, prepared by the procedure of Daves et. al. [J. Het. Chem., 1:130-132 (1964)] in EtOH (250 mL) under N₂ was added Boc₂O (7.3 g). After the mixture was briefly placed under high vacuum and flushed with N₂, 10% Pd/C (219 mg) was added. H₂ was bubbled though the mixture (using balloon pressure with a needle outlet) as it stirred 4.2 h at RT. After filtration through Celite®, addition of 1.0 g additional Boc₂O, and concentration, the residue was purified by silica gel chromatography (5:1→4:1 hexanes/EtOAc) to obtain N-Boc-(2-chloropyrimidin-4-yl)-methylamine.

Preparation XC—Methanesulfonic acid 1-Boc-azetidin-3-ylmethyl ester

To a solution of (1-Boc-azetidin-3-yl)-methanol (1.06 g, 5.7 mmol), TEA (1.18 mL, 8.52 mmol) in CH₂Cl₂ at 0° C. was added MeSO₂Cl (0.53 mL, 6.82 mmol) via a syringe. The reaction was warmed to RT over 2 h and stirring was continued at RT for 2 h. The white solid formed was removed by filtration and the filtrate was washed with 25 mL of H₂O. The organic phase was dried over Na₂SO₄, and concentrated in vacuo to afford yellow oil.

Preparation XCI—N-(2-bromo-5-nitrophenyl)acetamide

2-Bromo-5-nitroaniline (10 g) was dissolved in 500 mL of CH₂Cl₂, DIEA (6.6 g) was added to the mixture, followed by DMAP (100 mg). The mixture was cooled to 0° C. in ice bath. Acetyl chloride (4 g in 50 mL CH₂Cl₂) was added dropwise to the reaction mixture. After the mixture was stirred at RT over 3 h, extracted once with saturated NaHCO₃ solution and once with brine, the resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 1:1 EtOAc:Hexane to 100% EtOAc to afford N-(2-bromo-5-nitrophenyl)acetamide as a white solid. MS: 258 (M−1).

Calc'd. for C₈H₇BrN₂O₃-259.06.

Preparation XCII—N-(2-bromo-5-nitrophenyl)-N-(2-methylprop-2-enyl)acetamide

A suspension of 2 g NaH (95% powder) in anhydrous DMF (100 mL) was cooled to −78° C., N-(2-bromo-5-nitrophenyl)acetamide (7 g) in dry DMF (50 mL) was added to the mixture under N₂ atmosphere. After the mixture was warmed to 0° C., 3-bromo-2-methylpropene (7.3 g in 20 dry DMF) was added to the mixture. The mixture was stirred at RT overnight. The mixture was poured into a container of ice and extracted between saturated NaHCO₃ solution and EtOAc. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 7:2 hexane:EtOAc to afford the title compound as a yellow gum. MS: 314 (M+1). Calc'd. for C₁₂H₁₃BrN₂O₃-313.15.

Preparation XCIII—1-(3,3-dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone

N-(2-Bromo-5-nitrophenyl)-N-(2-methylprop-2-enyl)acetamide (4.5 g) was dissolved in anhydrous DMF (50 mL), tetraethyl-ammonium chloride (2.5 g), sodium formate (1.2 g), NaOAc (3 g) were added, and the resulting mixture was bubbled with N₂ gas for 10 min. Pd(OAc)₂ (350 mg) was added and the mixture was heated at 80° C. under N₂ atmosphere overnight. After the mixture was concentrated in vacuo, it was partitioned between saturated NaHCO₃ solution and EtOAc, the resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 2:1 Hexane:EtOAc to afford the title compound as a yellow gum. MS: 235 (M+1). Calc'd. for C₁₂H₁₄N₂O₃-234.25.

Preparation XCIV—3,3-dimethyl-6-nitroindoline

1-(3,3-Dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone (1.8 g) was dissolved in EtOH (50 mL), 12N HCl (50 mL) was added and the resulting mixture was heated at 70° C. overnight. After the mixture was concentrated in vacuo, it was partitioned between saturated NaHCO₃ solution and EtOAc, the resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo to afford a yellow solid. MS: 193 (M+1). Calc'd. for C₁₀H₁₂N₂O₂-192.21.

Preparation XCV—1-Acetyl-6-amino-3,3-dimethylindoline

1-(3,3-Dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone (250 mg) was dissolved in MeOH (20 mL), the mixture was bubbled with H₂ for 10 min. 10% Pd/C (50 mg) was added and the mixture was stirred under H₂ overnight. The mixture was filtered through Celite® and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 1:1 EtOAc:CH₂Cl₂ to afford the title compound as a white crystalline material. MS: 205 (M+1). Calc'd. for C₁₂H₁₆N₂O-204.27.

Preparation XCVI—4-(1,1,2,2,3,3,4,4,4-nonafluorobutyl)phenylamine

4-Nitro-(1,1,2,2,3,3,4,4,4-nonafluorobutyl)benzene was synthesized by a method analogous to that described by Gregory, W. A. et al. (J. Med. Chem., 33(9): 2569-2578 (1990)). The mixture of the above nitro intermediate (1.0 mmol), iron powder (5.0 mmol) and NH₄Cl (0.7 mmol) in EtOH (3 mL) and H₂O (3 mL) was stirred for 4 h at 80° C.

Filtration and concentration gave the crude title compound, which was used without further purification.

Preparation XCVII—2-bromo-1-tert-butyl-4-nitrobenzene

NBS (125.0 g, 697.5 mmol, 1.5 eq) was slowly added to a solution of TFA:H₂SO₄ (5:1, 750 mL) and tert-butyl-4-nitrobenzene (100.0 g, 558.0 mmol) at RT. The solution was stirred for 24 h and poured over 5 kg of ice. The resulting suspension was filtered and washed with a 1:1 MeOH:H₂O solution (200 mL) and dried in a vacuum oven. MS (ES+): 258.1, 260.1 (M+H)⁺. Calc'd for C₁₀H₁₂BrNO₂: 257.0.

Preparation XCVIII—4-(2-tert-butyl-5-nitrophenyl)pyridine

To a solution of 2-bromo-1-tert-butyl-4-nitrobenzene (8.6 g, 33.3 mmol) and toluene (70 mL) in a 150 mL round bottom flask, 4-pyridylboronic acid (4.5 g, 36.6 mmol, 1.1 eq), Pd(PPh₃)₄ (3.8 g, 3.3 mmol, 0.1 eq) and K₂CO₃ (13.8 g, 99.9 mmol, 3 eq) were added. The solution was stirred for 24 h at 80° C. before cooling to RT. The solution was filtered through a pad of Celite® and purified by silica flash chromatography (30% EtOAc/Hexanes). This afforded the desired compound as a yellow solid. MS (ES+): 257.2 (M+H)⁺; (ES−): 255.2 (M−H)⁻. Calc'd for C₁₅H₁₆N₂O₂: 256.1.

Preparation XCIX—4-(2-tert-butyl-5-nitrophenyl)-1-methylpyridinium

4-(2-tert-Butyl-5-nitrophenyl)pyridine (2.0 g, 7.8 mmol) was added to a round-bottom flask and dissolved in EtOH (10 mL). CH₃I (30 mL) was added to the flask which was placed in a 80° C. sand bath and heated to reflux. After 6 h, the solution was cooled to RT and the excess CH₃I and EtOH were stripped-off under reduced pressure resulting in the desired compound as a light brown solid. MS (ES+): 271.2 (M+H)⁺; (ES−): 269.2 (M−H)⁻. Calc'd for C₁₆H₁₉N₂O₂ ⁺: 271.1.

Preparation C—4-tert-butyl-3-(1-methyl-1,2,3,6-tetrahydropyridin-4-yl)aniline

4-(2-tert-Butyl-5-nitrophenyl)-1-methylpyridinium (2.1 g, 7.8 mmol, Step C) was added to a 100 mL round-bottom flask and dissolved in a 10% H₂O/EtOH mixture. To the flask iron dust (1.31 g, 23.4 mmol, 3 eq) and NH₄Cl (460 mg, 8.6 mmol, 1.1 eq) were added. The flask was placed in a 100° C. sand bath and heated to reflux. After 2 h, the solution was cooled to RT and filtered through a pad of Celite®. The resulting solution was stripped down to a yellow solid and redissolved in MeOH (20 mL, anhydrous). The solution was cooled to 0° C. by placing it in an ice bath and slowly adding NaBH₄ (450 mg, 11.7 mmol, 1.5 eq). After addition of the NaBH₄, the solution was cooled to RT and stirred for 30 min. The solvent was stripped-off under vacuum and the solid was redissolved in CH₂Cl₂ and filtered. The solution was concentrated in vacuo to afford an amorphous clear yellow solid. MS (ES+): 245.2 (M+H)⁺. Calc'd for C₁₆H₂₄N₂: 244.2.

Preparation CI—[1-(4-amino-phenyl)-ethyl]carbamic acid tert-butyl ester

A mixture of 1-(S)-1-(4-nitrophenyl)ethylamine hydrochloride (2 g), Boc₂O (2.6 g) and NaHCO₃ (3 g) in MeOH/H₂O (1:1, 200 mL) was stirred at RT overnight. The reaction was extracted with EtOAc twice then washed with H₂O followed by brine. The organic layer was dried with Na₂SO₄ and evaporated under reduced pressure to give the protected nitrophenyl ethylamine. Boc-1-(S)-1-(4 nitrophenyl)ethylamine (1 g) was hydrogenated by H₂ atmosphere in the presence of Pd/C (200 mg) to give Boc protected aniline (0.8 g). The intermediate was deprotected with 4 N HCl/dioxane to give the title compound as the HCl salt.

Preparation CII—1-[2-(tert-butyl)-5-aminophenyl]-4-methylpiperazine

A mixture of 2-t-butylaniline (5.4 g) and methylchlorethylamine hydrochloride (7 g) and K₂CO₃ (5 g) in NaI (2 g) in diglyme (150 m) was heated at 170° C. for 8 h. The reaction was filtered and the filtrate was evaporated under high vacuum. The residue was mixed with EtOAc (200 mL) and H₂O (200 mL) and extracted with EtOAc twice. The combined organic layer was washed with brine and dried over Na₂SO₄ and evaporated to give crude 1-[2-(tert-butylphenyl]-4-methylpiperazine. The crude 1-[2-(tert-butylphenyl]-4-methylpiperazine (260 mg) was stirred with H₂SO₄ (3 mL) at 0° C. and HNO₃ (1.2 mL, 70%) was slowly added to the reaction. The reaction was warmed to RT, stirred for 30 min, poured on ice and basified with K₂CO₃ slowly. The solution was extracted with EtOAc three times, washed with H₂O, followed by brine, dried over Na₂SO₄ and evaporated under reduced pressure. The residue was purified by column chromatography to give 1-[2-(tert-butyl)-5-nitrophenyl]-4-methylpiperazine (260 mg), which was hydrogenated under H₂ atmosphere to give 1-[2-(tert-butyl)-5-aminophenyl]-4-methylpiperazine.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 1-(5-aminophenyl)-4-methylpiperazine

Preparation CIII—4-(tert-butyl)-2-(4-methylpiperazinyl)phenylamine

A mixture of 1-(tert-butyl)-2-bromo-4-nitrobenzene (3 g) and N-methylpiperazine (8 g) was heated neat at 130° C. for 4 h. The residue was purified by column chromatography to give 1-[4-bromo-5-(tert-butyl)-2-nitrophenyl]-4-methylpiperazine, which was hydrogenated to furnish 4-(tert-butyl)-2-(4-methylpiperazinyl)-phenylamine.

Preparation CIV—(2-[4-(tert-butyl)-2-aminophenoxy]ethyl}dimethylamine

DEAD (2.6 mL) was added to a mixture of 2-nitro-4-tert-butylphenol (2 g) and N,N-dimethylethanolamine (1.3 g) and Ph₃P (4 g) in THF (50 mL). The reaction was stirred at RT for 1 h, diluted with EtOAc (50 mL) and washed with 1 N HCl twice. The aqueous layer was basified with NaHCO₃, extracted with EtOAc twice and washed with H₂O and brine. The organic layer was dried over Na₂SO₄ and evaporated to give {2-[4-(tert-butyl)-2-nitrophenoxy]ethyl}-dimethylamine. It was hydrogenated under H₂ atmosphere to give {2-[4-(tert-butyl)-2-aminophenoxy)ethyl}-dimethylamine.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) [2-(2-aminophenoxy)ethyl]-dimethylamine.

Preparation CV—2-amino-5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinoline

7-Nitro-2,3,4-trihydroisoquinolin-1-one (500 mg) was heated in POCl₃ (10 mL) to reflux for 8 h. The mixture was evaporated, mixed with toluene and evaporated again. The residue was dissolved in THF, H₂NNH₂ (1 mL) was slowly added to the reaction and stirred for 2 h. The reaction was evaporated, heated with HC(OEt)₃ (15 mL) at 115° C. for 2 h, extracted with EtOAc and hydrogenated to give 2-amino-5,6,7-trihydro-1,2,4-triazolo[3,4-a]isoquinoline.

Preparation CVI—tert-butyl 4-[(6-nitro-3,3-dimethylindolinyl)methyl]piperidinecarboxylate

3,3-Dimethyl-6-nitroindoline (450 mg) was dissolved in 20 mL of dichloroethane, N-boc-4-formylpiperidine (750 mg) was added to the mixture, followed by 2 g NaHB(OAc)₃ and 1 mL of glacial AcOH. The mixture was stirred at RT overnight. Saturated NaHCO₃ solution (20 mL) was added to the reaction mixture and stirred for 1 h. The resulting mixture was separated by separation funnel, the organic layer was extracted once with saturated NaHCO₃ solution and once with brine. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 9:1 Hexane:EtOAc to afford an orange oil. MS: 290 (M−99). Calc'd. for C₂₁H₃₁N₃O₄-389.5.

Preparation CVII—3,3-dimethyl-1-piperidin-4-ylmethyl-2,3-dihydro-1H-indol-6-ylamine

tert-Butyl 4-[(6-nitro-3,3-dimethylindolinyl)-methyl]piperidinecarboxylate (900 mg) was dissolved in 10 mL MeOH, the mixture was bubbled with H₂ for 10 min. 10% Pd/C (30 mg) was added and the mixture was stirred under H₂ overnight. The mixture was filtered through Celite® and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 1:1 Hexane:EtOAc to afford a colorless oil. MS: 360 (M+1). Calc'd. for C₂₁H₃₃N₃O₂-359.5.

Preparation CVIII—(2-chloro-(3-pyridyl))-N-(4-phenoxyphenyl)carboxamide

2-Chloronicotinoyl chloride (9.15 g, 0.052 mmol) was added to a stirred solution of 4-phenoxyaniline (10 g, 0.054 mmol) and DIEA (10 mL, 0.057 mmol) in CH₂Cl₂ (100 mL) at RT. The mixture was stirred for 48 h before removal of solvent under reduced pressure. The resulting residue was dissolved in EtOAc and washed several times with saturated NaHCO₃ aqueous solution and brine, respectively. The organic layer was dried over Na₂SO₄ and evaporated to leave a solid. This material was re-crystallized from EtOAc/Hexane mixture, followed by filtration and rinsing with Et₂O to give the desired compound as a white solid. MS m/z: 325 (M+1); 323 (M−1).

Preparation CIX—1-(1-methyl(4-piperidyl))-6-nitroindoline

6-Nitroindoline (5 g) was dissolved in 200 mL of dichloroethane. N-Methyl-4-piperidone (5 g) was added to the mixture, followed by NaHB(OAc)₃ (12 g) and 1 mL of glacial AcOH. The mixture was stirred at RT overnight. A saturated NaHCO₃ (200 mL) solution was added to the reaction mixture and stirred for 1 h. The resulting mixture was separated by separation funnel. The organic layer was extracted once with saturated NaHCO₃ solution and once with brine. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 2:1 EtOAc:MeOH to afford orange oil. MS: 262 (M+1). Calc'd. for C₁₄H₁₉N₃O₂-261.3.

Preparation CX—1-(1-methyl-4-piperidyl)indoline-6-ylamine

1-(1-Methyl(4-piperidyl))-6-nitroindoline (3 g) was dissolved in 100 mL MeOH and the mixture was bubbled with H₂ for 10 min. 10% Pd/C (200 mg) was added and the mixture was stirred under H₂ overnight. The mixture was filtered through Celite® and concentrated in vacuo to afford light yellow oil. MS: 232 (M+1). Calc'd. for C₁₄H₂₁N₃-231.3.

Preparation CXI—N-(2-bromo-5-nitrophenyl)acetamide

2-Bromo-5-nitroaniline (10 g) was dissolved in CH₂Cl₂ (500 mL), DIEA (6.6 g) was added to the mixture, followed by 100 mg of DMAP. The mixture was cooled to 0° C. in ice bath. Acetyl chloride (4 g in 50 mL CH₂Cl₂) was added dropwise to the reaction mixture. After the mixture was stirred at RT over 3 h, and extracted once with saturated NaHCO₃ solution and once with brine. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 1:1 EtOAc:Hexane to 100% EtOAc to afford a white solid. MS: 258 (M−1). Calc'd. for C₈H₇BrN₂O₃-259.1.

Preparation CXII—N-(2-bromo-5-nitrophenyl)-N-(2-methylprop-2-enyl)acetamide

A suspension of NaH (2 g) (95% powder) in 100 mL anhydrous DMF was cooled to −78° C., and N-(2-bromo-5-nitrophenyl)acetamide (7 g) in 50 mL dry DMF was added to the mixture under N₂. After the mixture was warmed to 0° C., 3-bromo-2-methylpropene (7.3 g in 20 dry DMF) was added to the mixture. The mixture was stirred at RT overnight. The mixture was poured into a container of ice and extracted between saturated NaHCO₃ solution and EtOAc. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 7:2 Hexane:EtOAc to afford a yellow gum. MS: 314 (M+1). Calc'd. for C₁₂H₁₃BrN₂O₃-313.1.

Preparation CXIII—1-(3,3-dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone

N-(2-Bromo-5-nitrophenyl)-N-(2-methylprop-2-enyl)acetamide (4.5 g) was dissolved in 50 mL anhydrous DMF, 2.5 g tetraethyl-ammonium chloride, 1.2 g sodium formate, 3 g sodium acetate were added, the resulting mixture was bubbled with N₂ gas for 10 min. Pd(OAc)₂ (350 mg) was added and the mixture was heated at 80° C. under N₂ overnight. After the mixture was concentrated in vacuo, it was extracted between saturated NaHCO₃ solution and EtOAc, the resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 2:1 Hexane:EtOAc to afford a yellow gum. MS: 235 (M+1). Calc'd. for C₁₂H₁₄N₂O₃—234.2.

Preparation CXIV—3,3-dimethyl-6-nitroindoline

1-(3,3-Dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone (1.8 g) was dissolved in 50 mL EtOH, 50 mL 12N HCl was added and the resulting mixture was heated at 70° C. overnight. After the mixture was concentrated in vacuo, it was extracted between saturated NaHCO₃ solution and EtOAc. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo to afford a yellow solid. MS: 193 (M+1). Calc'd. for C₁₀H₁₂N₂O₂-192.2.

Preparation CXV—3,3-dimethyl-1-(4-methyl-piperazin-1-yl)-6-nitro-2,3-dihydro-1H-indole

3,3-Dimethyl-6-nitroindoline (0.8 g) was dissolved in 50 mL of dichloroethane, N-methyl-4-piperidone (1 g) was added to the mixture, followed by 2.5 g NaHB(OAc)₃ and 1 mL of glacial AcOH. The mixture was stirred at RT overnight. Saturated NaHCO₃ solution (50 mL) was added to the mixture and stirred for 1 h. The resulting mixture was separated by separation funnel, the organic layer was extracted once with saturated NaHCO₃ solution and once with brine, the resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo. The crude material was purified by flash chromatography on silica gel with 9:1 EtOAc:MeOH to afford an orange oil. MS: 290 (M+1). Calc'd. for C₁₆H₂₃N₃O₂-289.4.

Preparation CXVI—3,3-dimethyl-1-(1-methyl(4-piperidyl))indoline-6-ylamine

3,3-Dimethyl-1-(4-methyl-piperazin-1-yl)-6-nitro-2,3-dihydro-1H-indole (600 mg) was dissolved in 20 mL MeOH, the mixture was bubbled with H₂ for 10 min. 10% Pd/C (100 mg) was added and the mixture was stirred under H₂. The mixture was filtered through Celite® and concentrated in vacuo to afford an oil. MS: 260 (M+1). Calc'd. for C₁₆H₂₅N₃-259.4.

Preparation CXVII—3-(1-methyl-1,2,3,6-tetrahydro-pyridin-4-yl)-5-nitro-1H-indole

5-Nitroindole (2.6 g) was dissolved in 100 mL anhydrous MeOH, followed by 5 g N-methyl-4-piperidone and NaOMe (5 g) powder. The mixture was heated to reflux under N₂ overnight. The mixture was concentrated in vacuo, and was extracted between saturated NaHCO₃ solution and EtOAc. The resulting organic layer was dried over MgSO₄, filtered and concentrated in vacuo to afford a yellow solid. This solid was washed with 5 mL EtOAc and 2 mL MeOH to afford a bright yellow solid. MS: 258 (M+1). Calc'd. for C₁₄H₁₅N₃O₂-257.29.

Preparation CXVIII—3-(1-methyl-4-piperidyl)indole-5-ylamine

3-(1-Methyl-1,2,3,6-tetrahydro-pyridin-4-yl)-5-nitro-1H-indole (2.7 g) was dissolved in 50 mL MeOH, the mixture was bubbled with H₂ for 10 min. 10% Pd/C (150 mg) was added and the mixture and stirred under H₂ overnight. The mixture was filtered through Celite® and concentrated in vacuo to afford a yellow oil. MS: 230 (M+1). Calc'd. for C₁₄H₁₉N₃-229.3.

Preparation CXIX—{3-[3-amino-5-(trifluoromethyl)phenyl]propynyl}dimethylamine

A mixture of 3-bromo-5-trifluoromethylaniline (1.4 g, 5.9 mmol), 1-dimethylamino-2-propyne (1.3 mL, 0.76 mmol), PdCl₂(PPh₃)₂ (0.26 g, 0.29 mmol) and CuI (114 mg, 0.60 mmol) in 10 mL of TEA was heated at 100° C. in a sealed tube for 3 h. The resulting mixture was filtered over Celite®. The filtrate was concentrated, and the residue was purified by prep-HPLC (reverse phase) to give the aniline. MS (ES+): 243 (M+H)⁺; (ES−): 241 (M−H)⁻. Calc'd C₁₂H₁₃F₃N₂-242.24.

Preparation CXX—{3-[3-amino-5-(trifluoromethyl)phenyl]propyl}dimethylamine

A mixture of {3-[3-amino-5-(trifluoromethyl)-phenyl]propyl}dimethylamine (7 g, 29 mmol) and Pd(OH)₂ (0.5 g) in 250 mL of MeOH was stirred under 50 psi H₂. After 2 h, the resulting mixture was filtered over Celite®. The filtrate was concentrated, and the residue was diluted with aq. 1 N HCl. The aq. layer was washed with Et₂O, made basic with aq. 5 N NaOH, and extracted with CH₂Cl₂. The organic solution was dried over Na₂SO₄ and concentrated to give the titled compound. MS (ES+): 386 (M+H)⁺; (ES−): 384 (M−H)⁻. Calc'd C₁₈H₁₉ClF₃N₃O-385.8.

Preparation CXXI—4,4,5,5-tetramethyl-2-(1-methyl(4-1,2,5,6-tetrahydropyridyl))-1,3,2-dioxaborolane

To a solution of LiHMDS (25 mL, 25 mmol, 1.0 M in THF) in 35 mL of THF was added 1-methyl-4-piperidinone (3.0 mL, 25 mmol) at −78° C. The resulting solution was stirred for 2 h, then Tf₂NPh (8.9 g, 25 mmol) was added. The resulting solution was warmed to RT and stirred for 2 h. The mixture was concentrated, and the residue was purified by alumina (neutral) chromatography to give 1-methyl-4-(1,2,5,6-tetrahydro)pyridyl-(trifluoromethyl)sulfonate. A mixture of above triflate (5.0 g, 20 nmol), bis(pinacolato)diboron (5.6 g, 22 mmol), potassium acetate (6.5 g, 66 mmol), PdCl₂dppf (0.44 g, 0.66mmol), and (dppf)2 (0.33 g, 0.6 mmol) in 60 mL of dioxane was heated at 80° C. for 4 h. The resulting mixture was cooled to RT, diluted with Et₂O (150 mL). The ethereal solution was washed with H₂O followed by brine. The organic layer dried over Na₂SO₄, concentrated, and recrystallized in hexane-Et₂O to give the title intermediate.

Preparation CXXII—5-(1-methyl(4-1,2,5,6-tetrahydropyridyl))-3-(trifluoro-methyl)phenylamine

To a mixture of 4,4,5,5-tetramethyl-2-(1-methyl(4-1,2,5,6-tetrahydropyridyl))-1,3,2-dioxaborolane (1.0 g, 4.4 mmol), PdCl₂pddf (0.16 g, 0.2 mmol)and K₂CO₃ (1.8 g, 13.2 mmol) and 3-amino-5-bromobenzotrifluoride (0.8 g, 3.3 mmol) in DMF (25 mL) was heated at 80° C. for 16 h. The resulting mixture was diluted with EtOAc, washed with H₂O, dried over Na₂SO₄, and concentrated. The residue was purified by SiO₂ chromatography to give the title intermediate. MS (ES+): 257 (M+H)⁺. Calc'd C₁₃H₁₅F₃N₂-256.3.

Preparation CXXIII—4-phenylpiperidine

4-Cyano-4-phenylpiperidine HCl (10.0 g, 45.0 mmol) was combined with KOH pellets and stirred vigorously under Ar at 160° C. for 4 h. The reaction mix was cooled to RT and dissolved into toluene (100 mL) and H₂O (100 mL). After separation of the layers, the aqueous layer was back-extracted two times with toluene. The combined organic layer was dried over Na₂SO₄, concentrated in vacuo, and dried under high vacuum, yielding a white solid.

Preparation CXXIV—1-methyl-4-phenylpiperidine

To a stirring mixture at RT of 4-phenylpiperidine (5.24 g, 32.48 mmol) in CH₃CN (95 mL) was added a 37% solution of HCHO in H₂O (13 mL). To this mixture was added NaCNBH₃ (3.27 g, 51.97 mmol). AcOH was added dropwise every 10 min over the next h to maintain the reaction pH near 7. The reaction volume was then reduced in vacuo. The reaction mix was diluted with CH₂Cl₂ and washed with 2 N NaOH and then brine. The crude was concentrated in vacuo and eluted through a silica gel column with 10% MeOH/CH₂Cl₂. The 1-methyl-4-phenylpiperidine was concentrated in vacuo, yielding a clear oil.

Preparation CXXV—4-(1-methyl-4-piperidyl)phenylamine

To 1-methyl-4-phenylpiperidine (2.663 g, 15.19 mmol) was added carefully H₂SO₄ (15.2 mL). The reaction was cooled in an ice bath and a solution of H₂SO₄ (1.66 mL) and fuming HNO₃ (0.67 mL, 15.95 mmol) was added dropwise over 45 min. The mix was stirred at 0° C. for 3 h then at RT for 1.5 h before being poured over about 90 g ice and basified with 24 g solid NaOH. The mix was extracted with CH₂Cl₂. The organic layer was washed with H₂O, dried over Na₂SO₄, and concentrated in vacuo. The crude was eluted on a silica gel column with a MeOH/CH₂Cl₂ gradient to yield 1-methyl-4-(4-nitrophenyl)piperidine which was hydrogenated under H₂ to furnish the title compound.

Preparation CXXVI—1-piperidylprop-2-en-1-one

To a 0° C. solution of acryloyl chloride (4.576 g, 50.558 mmol) in CH₂Cl₂ (50 mL) was added dropwise and very carefully piperidine (4.305 g, 50.558 mmol). The reaction flask was vented during the exothermic addition. After the addition was completed, the white slurry was stirred at 0° C. for 40 min and at RT for 1 h. The reaction was diluted with 70 mL CH₂Cl₂ and washed first with about 60 mL 2 N HCl and then with about 60 mL of a mix of 2N NaOH and brine. The organic layer was dried over Na₂SO₄. The solution was evaporated by heating in a H₂O bath at 60° C. without vacuum. Once most solvent had been evaporated off, dried the clear oil under high vacuum at RT for 30 min.

Preparation CXXVII—1-(tert-butyl)-2-bromo-4-nitrobenzene

Bromine (17.4 mL) was added dropwise over 40 min to a stirred mixture of 4-tert-butylnitrobenzene (59.5 g, 332 mmol), silver(II)sulfate (56.5 g, 181 mmol), H₂SO₄ (300 mL), and H₂O (33 mL) at RT. The mixture was stirred for a further 3 h and then poured into 0.1 M Na₂S₂O₅/H₂O (1 L). The solid was filtered, washed with H₂O, Et₂O, and CH₂Cl₂. The filtrate layers were separated. The aqueous fraction was extracted with Et₂O. The combined organic layers were combined, dried over Na₂SO₄, and concentrated in vacuo. The yellow solid was triturated with hexanes to give a pale yellow crystalline solid.

Preparation CXXVIII—(2E)-3-[2-(tert-butyl)-5-nitrophenyl]-1-piperidylprop-2-en-1-one

1-(tert-Butyl)-2-bromo-4-nitrobenzene (6.885 g, 26.674 mmol), 1-piperidylprop-2-en-1-one (4.827 g, 34.677 mmol), and TEA (7.44 mL, 53.35 mmol) were dissolved in toluene (70 mL). To this solution was added Pd(OAc)₂ (60 mg, 0.267 mmol) and Pd(PPh₃)₄ (617 mg, 0.5335 mmol). The mix was degassed with N₂ and heated in a sealed vessel at 120° C. for 15 h. The reaction mixture was cooled to RT, filtered, and concentrated in vacuo. The dark crude oil was eluted through a silica gel column with 15% to 22% EtOAc/hexanes gradient system to yield a thick amber oil as the title compound.

Preparation CXXIX—3-(5-amino-2-tert-butylphenyl)-1-piperidin-1-yl-propenone

(2E)-3-[2-(tert-Butyl)-5-nitrophenyl]-1-piperidylprop-2-en-1-one (3.22 g, 10.177 mmol) was dissolved in dioxane (20 mL) and IpOH (40 mL). To the N₂-degassed solution was added Pd/C 10% by weight catalyst (2 g). The mix was placed in a Parr hydrogenator and stirred for 18 h under 60 psi H₂. The reaction was not complete the next day, so the reaction was continued for an additional 20 h with fresh catalyst. The mix was filtered through Celite® and concentrated in vacuo to give a foamy oil.

Preparation CXXX—4-(tert-butyl)-3-(3-piperidylpropyl)phenylamine

3-(5-Amino-2-tert-butylphenyl)-1-piperidin-1-yl-propenone (2.312 g, 7.619 mmol) was dissolved in THF (100 mL) at RT. To this solution was added LiAlH₄ (434 mg, 11.43 mmol). After the reaction stopped exotherming, it was heated at reflux at about 80° C. for 4 h. The reaction mix was cooled to 0° C. and treated by dropwise addition of 0.458 mL H₂O, 0.730 mL 10% aqueous NaOH, and 1.19 mL H₂O, respectively. The mix was stirred at RT for 1 h. After 40 min about 3 g of Na₂SO₄ was added. The mix was filtered through Celite® and concentrated in vacuo. The crude was eluted through silica gel column with a gradient system of 95:5 to 90:10 CH₂Cl₂/MeOH, to yield an amber thick oil as the title compound.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 3-((1E)-4-Pyrrolidinylbut-1-enyl)-4-(tert-butyl)phenylamine.     -   b) 4-(tert-Butyl)-3-(3-pyrrolidinylpropyl)phenylamine.     -   c) 4-(tert-Butyl)-3-(3-morpholin-4-ylpropyl)phenylamine.     -   d) 3-[3-(4-methylpiperazinyl)propyl]phenylamine.     -   e) 4-[3-(4-methylpiperazinyl)propyl]phenylamine.

Preparation CXXXI—3-(3-nitrophenyl)-1-(4-methylpiperazinyl)propan-1-one

A slurry consisting of CH₂Cl₂ (15 mL), 3-nitrocinnamic acid (3.154 g, 16.329 mmol), 1-methylpiperazine (1.487 g, 14.845 mmol) and EDC (3.557 g, 18.556 mmol) were stirred at RT for 60 h. The reaction was diluted with H₂O and EtOAc. The aqueous layer was back-extracted with EtOAc. The combined organic layers were washed with 2 N NaOH and then brine, dried over Na₂SO₄, and concentrated in vacuo. The crude was eluted through a silica gel column with 5% MeOH/CH₂Cl₂, to yield an off-white solid, mostly trans-olefin compound.

Preparation CXXXII—3-(3-aminophenyl)-1-(4-methylpiperazinyl)propan-1-one

To a nitrogen-degassed solution of 3-(3-nitrophenyl)-1-(4-methylpiperazinyl)propan-1-one (3.67 g, 13.330 mmol, Step A) in MeOH (50 mL) was added 10% by weight Pd/C (500 mg). The mix was stirred under H₂ atmosphere for 18 h then filtered through Celite® and concentrated in vacuo, yielding a thick amber oil which eventually solidified into a dark pink solid.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 4-[3-(4-methylpiperazinyl)-3-oxopropyl]phenylamine.

Preparation CXXXIII—1-(2-morpholin-4-ylethyl)indol-6-ylamine

K₂CO₃ (5.08 g, 36.726 mmol) was added to a slurry of 6-nitroindole (1.985 g, 12.242 mmol), 4-(2-chloroethyl)morpholine HCl (2.278 g, 12.242 mmol), and CH₃CN (100 mL). The mix was heated to reflux for 18 h, then cooled to RT, filtered, and concentrated in vacuo. The crude was eluted through a silica gel column with a gradient of 3:97 to 5:95 and finally 8:92 MeOH/CH₂Cl₂, to yield upon drying the desired intermediate which was hydrogenated under conditions previously described.

Preparation CXXXIV—methyl 2-methyl-2-(4-nitrophenyl)propanoate

To a stirred solution of 2-(4-nitrophenyl)propionic acid (9 g, 46 mmol, 1 eq) in MeOH (300 mL) was added HCl (4 M in Dioxane, 11.5 mL, 46 mmol, 1 eq). The mixture was stirred at RT overnight and was quenched with aqueous NaHCO₃. The mixture was extracted with EtOAc. The organic layer was dried over MgSO₄ and evaporated under reduced pressure and the partial residue (4.34 g, 20.7 mmol, 1 eq) at 0° C. in THF (100 mL) was added NaH (1.66 g, 41.5 mmol, 2 eq). Mixture was stirred at RT for 1 h and CH₃I (2.58 g, 41.5 mmol, 2 eq) was added. Reaction was stirred at RT overnight and was quenched with H₂O. Mixture was extracted with EtOAc. The organic layer was dried over MgSO₄ and evaporated under reduced pressure and used for the next step without further purification to give title compound.

Preparation CXXXV—3-methyl-3-(4-nitrophenyl)butan-1-one

To a stirred solution of methyl 2-methyl-2-(4-nitrophenyl)propionate (5.32 g, 23.8 mmol) in THF (200 mL) at 0° C. was added a solution of 1M BH₃ in THF (25.8 mL, 45.8 mmol). The reaction was stirred at RT overnight and was quenched with MeOH. THF was evaporated under reduced pressure and the residue was diluted in EtOAc and aqueous HCl (1 M) was added. The mixture was extracted with EtOAc, the organic layer was dried over MgSO₄ and evaporated under reduced pressure. Purification by flash chromatography using 40% EtOAc-hexane gave a yellow solid. To the yellow solid (2.08 g, 10.8 mmol) at 0° C. in CH₂Cl₂ was added NMO (1.9 g, 16.1 mmol), molecular sieves 4 Å and TPAP (76 mg, 0.2 mmol). The reaction was stirred for 1 h and filtered on a silica pad. Solvent was evaporated under reduced pressure, forming the crude aldehyde which was used as is. To a suspension of methoxymethyltriphenylphosphonium chloride (6.4 g, 18.6 mmol) in THF (150 mL) was added a solution of KHMDS 0.5 M in toluene (37 mL, 18.5 mmol). The mixture was stirred for 30 min and crude aldehyde was added. The reaction was stirred at RT for 1 h and quenched with H₂O. The mixture was extracted with EtOAc, dried and evaporated under reduced pressure. Et₂O was added and a precipitate formed, which was filtered on a silica pad and rinsed with 40% EtOAc-hexane. The solvent was removed and crude material was dissolved in CH₂Cl₂. A solution of TFA-H₂O (1:1, 10 mL) was added and the reaction was stirred for 2 h at RT. Aqueous NaHCO₃ was added until pH 7 and the mixture was extracted with CH₂Cl₂. The organic layer was dried, filtered and evaporated. Crude compound was purified by flash chromatography (40% EtOAc-hexane) to give the title compound as a yellow oil.

Preparation CXXXVI—4-(1,1-dimethyl-3-morpholin-4-ylpropyl)phenylamine

To a stirred solution of 3-methyl-3-(4-nitrophenyl)butan-1-one (509 mg, 2.4 mmol) and morpholine (0.21 mL, 2.4 mmol) in THF (30 mL) was added NaBH(OAc)₃ (0.73 g, 3.4 mmol). The mixture was stirred at RT overnight and washed with HCl (1M). CH₂Cl₂ was added and the layers were separated. The aqueous layer was basified to pH 9 using NaOH 1M and extracted with CH₂Cl₂. The organic layer was dried and evaporated the nitro compound. To a solution of the nitro compound (0.50 g, 1.8 mmol) in THF (40 mL) was added AcOH (1.97 mmol, 34.5 mmol) followed by zinc (9.1 g, 137 mmol). The mixture was stirred for 1 h, filtered on Celite®, diluted with H₂O and aqueous NaHCO₃, and the THF layer was evaporated. The residue was extracted with EtOAc, dried and evaporated to give the title compound.

Preparation CXXXVII—4-{2,2,2-trifluoro-1-[2-(2-methoxy)ethoxy]-1-(trifluoromethyl)ethyl}phenylamine

Diethyl azodicarboxylate (366 mg, 2.1 mmol) was added drop-wise to a solution of 2-(4-aminophenyl)-1,1,1,3,3,3-hexafluoropropan-2-ol (520 mg, 2 mmol), 2-(2-methoxyethoxy)ethan-1-ol (240 mg, 2 mmol) and PPh₃ (550 mg, 2.1 mmol) in THF (10 mL). The mixture was stirred for 2 h, then partitioned between EtOAc and aqueous NaHCO₃ solution. The organic phase was washed with brine. After concentration in vacuo, the organic residue was purified by flash chromatography on silica to give the compound. MS: 362 (M+1). Calc'd. for C₁₄H₁₇F₆NO₃-361.29.

Preparation CXXXVIII—2-fluoropyridine-3-carbonyl chloride

To a solution of 2-fluoropyridine (10 g, 100 mmol) in THF (150 mL) under −78° C. was added an LDA solution (2 M in heptane/THF/ethylbenzene, 60 mL) dropwise. The mixture was stirred at −78° C. for 3 h, then was quenched with a stream of dry CO₂. After warming to RT, the mixture was partitioned between EtOAc (100 mL) and H₂O (200 mL). The aqueous layer was acidified to pH between 3-4, and extracted with EtOAc. The organic solution was collected and washed with brine and dried over Na₂SO₄. After removing the solvent in vacuum, 2-fluoropyridine-3-carboxylic acid was obtained as a brown oil. MS: 140 (M−H). Calc'd. for C₆H₄FNO₂-141.10. 2-Fluoropyridine-3-carboxylic acid (7 g) was suspended in SOCl₂ (100 mL). After heating under reflux for 2 h, the mixture became homogeneous. Access SOCl₂ was removed in vacuo to afford a brown solid as desired compound.

Preparation CXXXIX—N-(3-Amino-5-chloro-phenyl)-2-dimethylamino-acetamide

To a solution of 5-chloro-benzene-1,3-diamine (3 g, 21 mmol) and dimethylamino-acetic acid (2.2 g, 21 mmol) in CH₂Cl₂ (300 mL) was added EDC (5 g, 25 mmol), HOBt (2.9 g, 21 mmol), and DIEA (5 mL). The reaction mixture was stirred at RT for overnight. Solvent was removed in vacuum and the residue was purified through flash chromatography on silica gel (0-8% MeOH in EtOAc) to give the desired compound.

Preparation CXL—2-amino-4-nitro-benzamide

To a solution of 2-amino-4-nitro-benzoic acid (9.1 g, 50 mmol) in CH₂Cl₂ (500 mL) was added EDC (12 gram, 60 mmol), HOBt (6.8 g, 50 mmol), DIEA (12 mL), and NH₃ in MeOH (2 M, 40 mL). The reaction was stirred at RT for overnight, and a precipitation formed. The solid was isolated via vacuum filtration.

Preparation CXLI—6-nitro-3H-quinazolin-4-one

2-Amino-4-nitro-benzamide was suspended in triethyl orthoformate (50 mL) and the mixture was heated to 140° C. for 5 h. Excess reagent was removed in vacuum. The residue was washed in hexanes to give the compound as a yellow solid.

Preparation CXLII—6-amino-3H-quinazolin-4-one

Hydrogenation of 6-nitro-3H-quinazolin-4-one (2 g) in EtOH (200 mL) was catalyzed by Pd/c (10%, 200 mg) under a H2 balloon for 1 h. MeOH (200 mL) was added to the mixture. The suspension was filtered through a layer of Celite® and the filtrate was concentrated in vacuum to give the desired compound.

Preparation CXLIII—(2,4-dinitro-phenyl)-acetic acid methyl ester

To a solution of (2,4-dinitro-phenyl)-acetic acid (5 g) in MeOH (100 mL) was added concentrated H₂SO₄ (1 mL) and the resulting solution was heated at reflux for overnight. After removing solvent in vacuum, the residue was partitioned between EtOAc and aqueous NaHCO₃ (sat.). The organic solution was concentrated in vacuum to give the desired compound which was used without further purification.

Preparation CXLIV—6-amino-1,3-dihydro-indol-2-one

An EtOH solution of (2,4-dinitro-phenyl)-acetic acid methyl ester was treated with H2 balloon and catalyzed with Pd/c (10%, 500 mg) at RT. The resulting mixture was filtered through a layer of Celite® and concentrated in vacuum to afford the desired compound.

Preparation CXLVI—3-Methyl-but-2-enoic acid (6-bromo-pyridin-2-yl)-amide

To a solution of 2-amino-6-bromopyridine (3.015 g, 0.017 mmol) and Et₃N (2.40 mL, 0.017 mmol) in CH₂Cl₂ (20.0 mL), was added 3,3-dimethylacryloylchloride (1.96 mL, 0.017 mmol) under N₂ at 0° C. The mixture was slowly warmed to RT and stirred for 12 h. The reaction was quenched by the addition of H₂O (20.0 mL), the organic layer was separated, dried over Na₂SO₄ and evaporated to dryness to yield crude compound which was used without purification.

Preparation CXLVI—3-Methyl-but-2-enoic acid (6-amino-pyridin-2-yl)-amide

To a solution of 3-methyl-but-2-enoic acid (6-bromo-pyridin-2-yl)-amide (4.30 g, 0.017 mmol) and copper (0.214 g, 3.372 mmol) in IpOH (20.0 mL), was added NH₄OH (20.0 mL) in a sealed vessel under N₂. The reaction was sealed and heated to 90° C. for 12 h. The reaction mixture was cooled to RT and EtOAc (50.0 mL) was added. The organic layer was separated, and then the aq layer was washed with EtOAc (50.0 mL). Combined organic layers were evaporated to dryness, the resulting residue was dissolved in CH₂Cl₂ (50.0 mL) and washed with H₂O (4×30 mL). The organic layer was dried over Na₂SO₄ and evaporated to dryness to yield crude aminopyridine which was used without purification.

Preparation CXLVII—7-Amino-4,4-dimethyl-3,4-dihydro-1H-[1,8]naphthyridin-2-one

To a mixture of aminopyridine (1.12 g, 5.833 mmol) and AlCl₃ (3.11 g, 0.023 mmol) was added chlorobenzene (10.0 mL) in a sealed vessel under Ar. The reaction was sealed and heated to 120° C. for 12 h. The reaction mixture was cooled to RT and the mixture was poured over ice/HCl mixture and extracted with EtOAc (3×50.0 mL). The aqueous layer was neutralized via addition of solid NaHCO₃ and extracted with EtOAc (5×50 mL). Combined organic layers were dried over Na₂SO₄ and evaporated to dryness to yield crude compound. Chromatography (Silica gel, CH₂Cl₂:MeOH, 99:1) yielded pure naphthyridin.

Preparation CXLVIII—2-[1-(3-Amino-phenyl)-2,2,2-trifluoro-1-trifluoromethyl-ethoxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

To a mixture of 2-(3-amino-phenyl)-1,1,1,3,3,3-hexafluoro-propan-2-ol (1.30 g), 2-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (1.04 g), PPh₃ (2.64 g) and molecular sieves 4 Å in THF (100 mL) was added diethyl diazocarboxylate (1.55 mL) slowly. The reaction was stirred at RT for 4 h and at reflux for overnight. After filtration to remove solids, the filtrate was concentrated and the residue was taken into Et₂O. The organic phase was washed with saturated NaHCO₃ and brine. The organic layer was dried over MgSO₄ and evaporated to give a crude compound as very viscous brown oil, which was purified by chromatography through silica gel (500 g, 30% to 50% EtOAc in hexanes) to afford 2-[1-(3-amino-phenyl)-2,2,2-trifluoro-1-trifluoromethyl-ethoxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester as a light brown oil.

Preparation CXLIX—Pyrimidine-4-carbaldehyde oxime

9.14 g (97.11 mmol) of 4-methylpyrimidine was slowly added to a 0° C. solution of 8.75 g HCl in 40 mL EtOH. To this white suspension was added, over 5 min, 61 mL of a 10-20% by weight solution of ethyl nitrite in EtOH. The reaction was stirred at 0° C. for 10 min and then at RT for 2.5 h. The white salt was filtered and dried under vacuum. The salt was dissolved into 20 mL H₂O and very slowly treated with about 200 mL saturated aqueous KHCO₃. A white solid precipitated out of the purple solution. The solid was filtered and dried under vacuum to yield the titled compound.

Preparation CL—C-Pyrimidin-4-yl-methylamine dihydrogen chloride

To a solution of 3.549 g (28.82 mmol) pyrimidine-4-carbaldehyde oxime in 200 mL MeOH was added after degassing with Ar, 800 mg of 10% by weight Pd/C. The mix was stirred under H₂ for 4 h, then filtered through a Celite® plug. The solution was concentrated under vacuum to a volume of about 50 mL and then treated carefully with 30 mL of 4 N HCl in dioxane. The mix was concentrated and dried under vacuum to yield the titled compound as a pink solid.

Preparation CLI—2-(2,4-Dinitro-phenyl)-3,3,3-trifluoro-2-trifluoromethyl-propionic acid methyl ester

A mixture of 7.08 g (38.07 mmol) 2,4-dinitrofluorobenzene, 2.43 g (41.88 mmol) KF, and 0.58 g (2.21 mmol) 18-crown-6-ether in 37 mL sulfolane was added 4.00 g (19.04 mmol) methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate dropwise over about 7 h via syringe pump. After the addition was complete, another 2.43 g KF, 0.58 g 18-Crown-6-ether were added and then 4.00 g Methyl 2-(trifluoromethyl)-3,3,3-trifluoropropionate were added dropwise over 12 h. The next day, repeated additions using same amounts and setting syringe pump addition over 14 h. The following day, the additions were again repeated, this time using half the amounts as above additions and setting syringe pump addition at 12 h. After addition was completed, the reaction mix was cooled to RT and diluted into Et₂O and 0.5 N aqueous HCl. The layers were separated, and the organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated under vacuum. The crude was eluted on a silica gel column with EtOAc/hexanes gradient, to yield the titled compound, as a yellow solid. [See Vlasov et al., J. Org. Chem. USSR (Engl. Trans.), 15:1953-1964 (1979)]

Preparation CLII—6-Amino-1-hydroxy-3,3-bis-trifluoromethyl-1,3-dihydro-indol-2-one

To an argon-degassed solution of 5.13 g (13.64 mmol) 2-(2,4-dinitro-phenyl)-3,3,3-trifluoro-2-trifluoromethyl-propionic acid methyl ester in 300 mL EtOH was added 0.5 g of 10% by weight Pd/C. The reaction was stirred under H₂ overnight and filtered through Celite®, concentrated down, and dried under vacuum, yielding the titled compound.

Preparation CLIII—6-Amino-3,3-bis-trifluoromethyl-1,3-dihydro-indol-2-one

To a solution of 1.245 g (4.151 mmol) 6-amino-1-hydroxy-3,3-bis-trifluoromethyl-1,3-dihydro-indol-2-one in 80 mL THF was added 3.565 mL (62.27 mmol) glacial AcOH and 19 g (290.6 mmol) Zinc dust (100 mesh). The reaction was stirred 40 min at RT and then 5 h at reflux. The reaction was cooled to RT. The solvent was decanted and concentrated, then dissolved in EtOAc and filtered through Celite®. The EtOAc solution was then washed with saturated aqueous NaHCO₃ and brine, dried over Na₂SO₄, filtered, and concentrated and dried under vacuum, to yield the titled compound, as a yellow solid.

Preparation CLIV—N-[3-(2-Amino-ethoxy)-4-pentafluoroethyl-phenyl]-2-chloro-nicotinamide

To a solution of 500 mg (0.98 mmol) Boc-N-[3-(2-Amino-ethoxy)-4-pentafluoroethyl-phenyl]-2-chloro-nicotinamide in 10 mL CH₂Cl₂ was added 10 mL TFA and stirred for 2 h. The reaction was concentrated down, treated with 6N aqueous NaOH, and extracted 3 times with CH₂Cl₂. The combined organic extracts were dried over Na₂SO₄, filtered, concentrated down, and dried under vacuum, yielding the titled compound.

Preparation CLV—2-Chloro-N-[3-(2-methanesulfonylamino-ethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide

To a solution of 381 mg (0.93 mmol) N-[3-(2-amino-ethoxy)-4-pentafluoroethyl-phenyl]-2-chloro-nicotinamide in 10 mL CH₂Cl₂ at 0° C. was added 0.389 mL Et₃N and 0.072 mL (0.93 mmol) methanesulfonylchloride. After 5 min, the reaction was stirred at RT for 30 min. The reaction was diluted with CH₂Cl₂, washed with brine, dried over Na₂SO₄, filtered, concentrated, and dried under vacuum, yielding the titled compound as a white foamy solid.

Preparation CLVI—2-Methyl-2-(4-nitro-phenyl)-propionic acid

To a solution of 2-(4-nitro-phenyl)-propionic acid (50 g, 0.26 mole) in 250 mL of MeOH was added 6 mL of concentrated HCl. The resulting solution was heated at reflux for 16 h. Then the resultant mixture was diluted with 200 mL of aq. NaHCO₃ and 500 mL of EtOAc. The organic layer was separated, dried over Na₂SO₄, and concentrated. The residue was diluted with 100 mL of THF and added to a suspension of NaH (11.2 g, 0.28 mole, 60% in mineral oil) in 600 mL of THF. To the resulting mixture was added CH₃I (18.3 mL, 0.29 mole) in one portion. The resulting mixture was stirred for 48 h at 40° C., then was diluted with aq. NH₄Cl solution and EtOAc. The organic layer was separated, dried over Na₂SO4, and concentrated. The residue was used without further purification.

To a solution of the residue (54 g, 0.24 mole) in 500 mL of MeOH was added 5N aq. NaOH (144 mL, 0.72 mole). The mixture was stirred for 16 h at 40° C. The resulting mixture was concentrated, the residue was diluted with H₂O (500 mL), and acidified with 2 N HCl to give a precipitate. The precipitate was filtered and dried to give the titled compound as a yellowish solid. MS: 210 (M+1), Calc'd for C₁₀H₁₂NO₄-210.20.

Preparation CLVII—2-Methyl-5-[1-methyl-1-(4-nitro-phenyl)-ethyl]-[1,3,4]oxadiazole

A mixture of 2-methyl-2-(4-nitro-phenyl)-propionic acid (5 g, 24 mmol.) and a few drops of DMF in SOCl₂ was stirred at reflux for 16 h. The resulting solution was concentrated to give corresponding acid chloride as a brown solid. To a mixture of the acid chloride (2.33 g, 10.2 mmol), acetic acid hydrazide (0.91 g, 12.2 mmol.), Et₃N (2.86 mL, 20.2 mmol.) in CH₂Cl₂ (50 mL) was added 2 crystals of DMAP at RT. The mixture was stirred for 16 h and concentrated. A solution of the residue in 50 mL of phosphorous oxychloride was heated at 95° C. for 16 h. The mixture was concentrated and diluted with ice-water and EtOAc. The organic layer was washed with saturated aq. NaHCO₃ solution twice, dried over Na₂SO₄, and concentrated. The residue was purified by SiO₂ chromatography (hexane:EtOAc=1:1) to give the titled compound as a pale yellow crystal. MS: 248 (M+1), Calc'd for C₁₂H₁₄N₃O₃-248.10.

Preparation CLVIII—2-Methyl-5-[1-methyl-1-(4-amino-phenyl)-ethyl]-[1,3,4]oxadiazole

A mixture of 2-methyl-5-[1-methyl-1-(4-nitro-phenyl)-ethyl]-[1,3,4]oxadiazole (1.36 g, 5.5 mmol) and Pd/C (68 mg) in EtOAc (50 mL), was stirred under 1 atm of H₂ for 16 h. The resultant was filtered over Celite®, and the filtrate was concentrated to give the titled compound as a pale yellow crystalline. MS: 218 (M+1) calc'd for C₁₂H₁₆N₃O-218.12.

Preparation CLIX—4-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-pyrimidine

To a mixture of 1-(4-nitro-phenyl)-propan-2-one (5.32 g, 29.7 mmol), triethylbenzylammonium chloride (0.34 g, 1.5 mmol), and 13 mL of aq. 5N KOH solution (65.3 mmol) in CH₂Cl₂ was added CH₃I (4.06 mL, 65.3 mmol). The resulting mixture was stirred at 40° C., and then diluted with EtOAc and H₂O. The organic layer was dried and concentrated. To the residue (1.0 g, 4.8 mmol) in toluene (30 mL) was added dimethylformamide dimethylacetal (1.27 mL, 9.6 mmol). The resulting mixture was heated at reflux for 6 h then concentrated to give 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one as a yellow solid (MS 263 (M+1) Calc'd for C¹⁴H₁₉N₂O₃-263.13).

A mixture of 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one (0.5 g, 1.9 mmol.), formamidine HCl (0.305 g, 3.8 mmol), and NaOEt (1.29 g, 4.0 mmol) was heated in Smith synthesizer under microwave for 10 min at 150° C. The resultant mixture was diluted with H₂O and EtOAc. The organic layer was dried, and the residue was used without further purification. MS: 244 (M+1) Calc'd for C₁₃H₁₄N₃O₂-244.10.

Preparation CLX—5-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-1H-pyrazole

A mixture of 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one (0.36 g, 1.4 mmol) and hydrazine hydrate (1.0 g, 6.25 mmol) in EtOH was heated at 50° C. for 3 h. The mixture was concentrated, and the residue was diluted with H₂O and EtOAc. The organic layer was dried over Na₂SO₄ and concentrated to give the titled compound as a yellow solid. MS: 232 (M+1) Calc'd for C₁₂H₁₄N₃O₂-232.10.

Preparation CLXI—2-tert-Butyl-5-nitro-phenylamine

Concentrated H₂SO₄ (1 L) was cooled to −10° C. with a dry ice IpOH bath in a 2 L 3-neck round bottom flask fitted with a mechanical stirrer and temperature probe. 2-t-Butylaniline (109 g, 730 mmol) was added, giving a clumpy solid. Once the temperature of the mixture was stabilized at −10° C., KNO₃ (101 g, 1001 mmol) was added portion-wise, as the solid, over 4 h, maintaining the temperature between −20 and −5° C. Once all of the KNO₃ was added, the reaction was stirred overnight with gradual warming to RT. The reaction was quenched by diluting with H₂O and extracting 3× with EtOAc. The EtOAc extracts were washed multiple times with saturated NaHCO₃(aq), until gas evolution ceased, then with brine. The EtOAc extracts were combined, dried over anhydrous Na₂SO₄, filtered and concentrated under reduced pressure giving a black oil. The oil was eluted through a 36×7 cm column of silica gel with a 5%; 10%; 15%; 25%; and 50% EtOAc:Hexanes step gradient (2 L each step) giving 2-tert-butyl-5-nitro-phenylamine as a red solid.

Preparation CLXII—2-Bromo-N-(2-tert-butyl-5-nitro-phenyl)-acetamide

2-tert-Butyl-5-nitro-phenylamine (70 g, 359 mmol) and a catalytic amount of DMAP were dissolved in THF (1.5 L) under N₂. TEA (109 g, 1077 mmol) was added and the solution was cooled to 0° C. Bromoacetyl bromide (207 g, 1023 mmol) was added and the reaction was gradually warmed to RT with stirring overnight. The reaction was partially concentrated under reduced pressure, treated with H₂O and extracted with EtOAc (3×). The EtOAc extracts were washed with brine, combined, dried over anhydrous Na₂SO₄, filtered and concentrated under reduced pressure giving a black oil. This oil was eluted through a 38×7 cm column of silica gel with 95:5:0.5 CH₂Cl₂:MeOH:NH₄OH_((aq)) eluant giving 2-bromo-N-(2-tert-butyl-5-nitro-phenyl)-acetamide as a brown solid.

Preparation CLXIII—N-(2-tert-Butyl-5-nitro-phenyl)-2-dimethylamino-acetamide

2-Bromo-N-(2-tert-butyl-5-nitro-phenyl)-acetamide (80 g, 253 mmol) and K₂CO₃ (70 g, 506 mmol) were combined in a 3-L 3-neck round bottom flask fitted with a mechanical stirrer, N₂ inlet, and pressure equalizing addition funnel. THF (1.75 L) was added and the mixture was cooled to 0° C. under N₂. DMA (400 mL of a 2 M solution in THF, 800 mmol) was added to the mixture through the pressure equalizing addition funnel over 30 min. The mixture was gradually warmed to RT with stirring overnight. The reaction was quenched by filtering it under vacuum and then concentrating the filtrate under reduced pressure. The recovered material was eluted through a 36×7 cm column of silica gel with 50% EtOAc:Hexanes giving N-(2-tert-butyl-5-nitro-phenyl)-2-dimethylamino-acetamide as a brown solid.

The pyrolidino and morpholino analogs are prepared by substituting the dimethylamine with respectively pyrolidine or morpholine and using the same chemistry as described.

-   -   a) N-(2-tert-Butyl-5-nitro-phenyl)-2-pyrrolidin-1-yl-acetamide.     -   b) N-(2-tert-Butyl-5-nitro-phenyl)-2-morpholin-4-yl-acetamide.

Preparation CLXIV—N-(5-Amino-2-tert-butyl-phenyl)-2-dimethylamino-acetamide

N-(2-tert-Butyl-5-nitro-phenyl)-2-dimethylamino-acetamide (25.8 g, 92 mmol) was dissolved in EtOH (1.4 L) and 1,4-dioxane (200 mL). The solution was degassed under vacuum with stirring. 10% Pd/C (2.5 g) was added (as a slurry in EtOH). The mixture was degassed again, then the reaction vessel was charged with H₂ gas (balloon) and stirred overnight at RT. The reaction was filtered through Celite® with MeOH and the filtrate was concentrated under reduced pressure. The recovered material was eluted through a 36×7 cm column of silica gel with a 97.5:2.5:0.25 and 95:5:0.5 CH₂Cl₂:MeOH:NH₄OH_((aq)) step gradient giving N-(5-amino-2-tert-butyl-phenyl)-2-dimethylamino-acetamide as a brown solid.

Preparation CLXV—5-Chloro-1-methyl-1H-pyrazole-4-carboxylic acid (4-tert-butyl-phenyl)-amide

5-Chloro-1-methyl-1H-pyrazole-4-carbonyl chloride (1.0 g, 5.6 mmol) was dissolved in CH₂Cl₂ (100 mL) under N₂ and cooled to 0° C. 4-t-Butylaniline was added and the reaction was stirred with gradual warming to RT overnight. The reaction was quenched with saturated NaHCO₃(aq) and extracted 3× with fresh CH₂Cl₂. The CH₂Cl₂ extracts were washed with brine, combined, dried over anhydrous Na₂SO₄, filtered and concentrated under reduced pressure giving 5-chloro-1-methyl-1H-pyrazole-4-carboxylic acid (4-tert-butyl-phenyl)-amide as a foamy pink solid.

Preparation CLXVI—1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole

A solution of 3-(2-bromo-ethyl)-1H-indole (5 g) in anhydrous CH₃CN (100 mL) was suspended with oven dried K₂CO₃ (20 g) and heated to reflux for 10 h. After cooling to RT, the mixture was filtered and the filter cake was washed with EtOH (50 mL). The combined filtrate was treated with NaBH₄ (300 mg) and stirred for 3 h at RT. Solvents were removed in vacuo and the residue was partitioned between H₂O (160 mL) and EtOAc (60 mL). The organic layer was extracted with aqueous HCl (0.5 N, 30 mL×2). The acid layer was basified with NH₄OH (aq. Conc.) and extracted with EtOAc. The organic phase was washed with brine and dried over Na₂SO₄ and concentrated to give the desired compound as a colorless thin oil.

Preparation CLXVII—6-nitro-1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole

1′,2′-Dihydrospiro(cyclopropane-1,3′-[3H]indole) (1.8 g 12.4 mmol) was added in dropwise over a period of 20 min to a cooled (−5 to −10° C.) solution of NaNO₃ (1.3 g) in H₂SO₄ (conc., 30 mL). After the addition, the reaction was stirred for another 40 min., then the mixture was poured onto crushed ice (200 g) and the resulting mixture was basified with NH₄OH (aq., conc.) with cooling. The basified mixture was extracted with EtOAc twice and the organic layer was washed with brine then dried over Na₂SO₄. After concentration in vacuo, the compound was isolated as a dark gray solid.

Preparation CLXVIII—Ethyl 6-nitro-1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole-1-carbamate

A solution of 6-nitro-1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole (2.7 g) in CH₂CL₂ (100 mL) was suspended with NaHCO₃ (5 g), and ethyl chloroformate was added dropwise with vigorous stirring. After the addition, the reaction was stirred overnight. The mixture was washed with H₂O (100 mL), then dried over Na₂SO₄ and concentrated in vacuo. The residue was recrystalized in MeOH to give the title compound as a dark gray crystalline.

Preparation CLXIX—Ethyl 6-amino-1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole-1-carbamate

Ethyl 6-nitro-1,2-dihydro-3-spiro-1′-cyclopropyl-1H-indole-1-carbamate (2.1 g) was dissolved in EtOH (200 mL), suspended with Pd/C (10%, 560 mg) and equipped with a balloon filled with H₂. The hydrogenation was finished in 3 h. The reaction mixture was filtered through a layer of Celite®. The filtrate was concentrated in vacuo to give the desired product as a white solid.

Preparation CLXX—4-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-3,6-dihydro-2H-pyridine-1-carboxylic acid ethyl ester

1-Methyl-4-[1-methyl-1-(4-nitro-phenyl)-ethyl]-1,2,3,6-tetrahydro-pyridine (5.2 g) was dissolved in toluene (100 mL) and ethyl chloroformate (2.4 g). The mixture was heated at reflux for overnight and cooled to RT. The toluene solution was washed with NaHCO₃ (aq., sat. 100 mL) then brine (100 mL) and dried over Na₂SO₄. The organic phase was concentrated in vacuo to give the desired compound which was used without purification.

Preparation CLXXI—4-[1-Methyl-1-(4-amino-phenyl)-ethyl]-3,6-dihydro-2H-pyridine-1-carboxylic acid ethyl ester

4-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-3,6-dihydro-2H-pyridine-1-carboxylic acid ethyl ester was dissolved in EtOH (150 mL) and suspended with Pd/C (10%, 1 g). The reaction flask was equipped with a balloon filled with H₂. The hydrogenation was continued for 3 days. The mixture was filtered through a layer of Celite® and concentrated in vacuo to provide the desired compound as a light brown oil.

Preparation CLXXII: 3,3-dimethyl-6-nitroindoline 3-Methyl-but-2-enoic acid (3-acetylamino-phenyl)-amide

3,3-Dimethylacryloyl chloride (3.3 mL, 29.3 mmol) was added to a mixture of 3′-aminoacetanilide (4.40 g, 29.3 mmol) and Et₃N (4.5 mL, 32.2 mmol) in 50 mL of CH₂Cl₂ and 25 mL of THF at 0° C. under N₂. The mixture was stirred at RT overnight, diluted with 100 mL of CH₂Cl₂, washed with aqueous Na₂CO₃, then brine, condensed, and purified by flash column chromatography (15 to 30% of EtOAc in CH₂Cl₂). The titled compound was obtained as an off-white solid. MS (ES⁺): 233.1 (M+H)⁺. Calc'd for C₁₃H₁₆N₂O₂-232.28.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 3-Methyl-but-2-enoic acid phenylamide. MS(ES⁺): 176.1 (M+H)⁺.         Calc'd for C₁₁H₁₃NO-175.23.

Preparation CLXXIII—N-(4,4-Dimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-acetamide

The mixture of 3,3-dimethyl-6-nitroindoline 3-Methyl-but-2-enoic acid (3-acetylamino-phenyl)-amide (1.05 g, 4.52 mmol) and AlCl₃ (5.0 g, 37.5 mmol, Aldrich, 99.99%) in 50 mL of anhydrous chlorobenzene was stirred at 120° C. (oil bath temperature) under N₂ overnight, cooled to RT, poured into 10 mL of ice cold HCl, stirred for 30 min, and extracted with EtOAc. The organic portions were combined, washed with brine, dried with Na₂SO₄, filtered, condensed, and purified by flash column chromatography (1% of MeOH in CH₂Cl₂). The titled compound was obtained as an off-white solid. MS (ES⁺): 233.2 (M+H)⁺. Calc'd for C₁₃H₁₆N₂O₂-232.28.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 4,4-Dimethyl-3,4-dihydro-1H-quinolin-2-one MS(ES⁺): 175.6         (M+H)⁺. Calc'd for C₁₁H₁₃NO-175.23.

Preparation CLXXIV: 7-Amino-4,4-dimethyl-3,4-dihydro-1H-quinolin-2-one

N-(4,4-Dimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-acetamide (1.50 g, 6.46 mmol) in 10 mL of HCl (concentrated, 37%) and 30 mL of EtOH was stirred at 75° C. for 4 h. The solvents were removed under reduced pressure. The residue was dissolved in EtOAc/H₂O, neutralized with NaHCO₃, washed with brine, dried with Na₂SO₄, filtered, and condensed to give the titled compound as an off-white solid. MS (ES⁺): 191.2 (M+H)⁺. Calc'd for C₁₁H₁₄N₂O—190.24.

Preparation CLXXV—4,4-Dimethyl-1,2,3,4-tetrahydro-quinolin-7-ylamine

The mixture of 7-amino-4,4-dimethyl-3,4-dihydro-1H-quinolin-2-one (1.07 g, 5.62 mmol) and borane dimethylsulfide complex (1.60 mL, 16.9 mmol)in 40 mL of anhydrous THF was heated at reflux under N₂ for 15 h. The solvents were removed under reduced pressure. The residue was heated at reflux in 20 mL of MeOH for 2 h, then 0.80 g of NaHCO₃ was added, and the mixture was heated at reflux for 2 h. The mixture was filtered, condensed, and the residue was purified by flash column chromatography (5 to 10% of EtOAc in CH₂Cl₂). The titled compound was obtained as a viscous oil. MS(ES⁺): 176.9 (M+H)⁺. Calc'd for C₁₁H₁₆N-176.26.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 4,4-Dimethyl-1,2,3,4-tetrahydroquinoline MS(ES⁺): 162.5         (M+H)⁺. Calc'd for C₁₁H₁₅N-161.24.

Preparation CLXXVI—N-(4,4-Dimethyl-1,2,3,4-tetrahydro-quinolin-7-yl)-2-fluoronicotinamide

The mixture of 4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-7-ylamine (0.20 g, 1.13 mmol), 2-fluoronicotinic acid (0.16 g, 1.13 mmol), TBTU (0.36 g, 1.13 mmol), and DIEA (0.24 mL, 1.36 mmol) in 5 mL of DMF was stirred at RT for 3 h, then partitioned between EtOAc and Na₂CO₃ (aq). The organic layer was washed with H₂O, brine, dried with MgSO₄, filtered, condensed, and the residue was purified by flash column chromatography (20 to 30% of EtOAc in CH₂Cl₂). The titled compound was obtained as an off-white solid. MS (ES⁺): 300.1 (M+H)⁺. Calc'd for C₁₇H₁₈FN₃O-299.34.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         N-(4,4-Dimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-2-fluoronicotinamide,         as an off-white solid. MS (ES⁺): 314.2 (M+H)⁺. Calc'd for         C₁₇H₁₆FN₃O₂-313.33.     -   b)         N-(1-Ethyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-7-yl)-2-fluoronicotinamide,         MS(ES⁺): 328.3 (M+H)⁺. Calc'd for C₁₉H₂₂FN₃O-327.40.

Preparation CLXXVII—4,4-Dimethyl-7-nitro-1,2,3,4-tetrahydro-quinoline

To 13 mL of H₂SO₄ (96%) cooled in a salt ice bath was added dropwise 4,4-dimethyl-1,2,3,4-tetrahydro-quinoline (5.80 g, 36.0 mmol). The resulting slurry was stirred for 30 min, upon when concomitant addition of HNO₃ (90%, 1.70 mL, 36.0 mmol) and H₂SO₄ (96%, 7 mL) was started, the addition was finished in 20 min, the mixture was stirred at 0° C. to 15° C. for 2 h, poured into ice, and extracted with EtOAc. The organic portion was washed with brine, condensed, and purified by flash column chromatography (0 to 10% of EtOAc in hexanes). The titled compound was obtained as a yellow oil. MS (ES⁺): 206.9 (M+H)⁺. Calc'd for C₁₁H₁₄N₂O₂-206.24.

Preparation CLXXVIII—1-Ethyl-4,4-dimethyl-7-nitro-1,2,3,4-tetrahydroquinoline

The mixture of 4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-quinoline (0.48 g, 2.33 mmol), iodoethane (0.21 mL, 2.56 mmol), and NaH (60%, 0.10 g, 2.5 mmol) in 10 mL of DMF was stirred at RT overnight, and partitioned between EtOAc and H₂O. The combined organic portions were washed with brine, dried with MgSO₄, filtered, and condensed. The crude compound was purified by flash column chromatography (5 to 10% of CH₂Cl₂ in hexanes). The titled compound was obtained as a yellow oil. MS (ES⁺): 235.3 (M+H)⁺. Calc'd for C₁₃H₁₈N₂O₂-234.29.

Preparation CLXXIX: 1-Ethyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-7-ylamine

The mixture of 1-ethyl-4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-quinoline (0.28 g) and Pd/C (0.060 g, 10% wt)in 10 mL of EtOAc was placed under H₂ which was provided by a balloon and stirred at RT overnight. Then the mixture was filtered through Celite®, condensed, and the residue was purified by flash column chromatography (2% of EtOAc in CH₂Cl₂). The titled compound was obtained as a pink oil. MS(ES⁺): 204.8 (M+H)⁺. Calc'd for C₁₁H₁₆N-204.31.

Preparation CLXXX—1-(4-Nitro-phenyl)-cyclopropanecarbonitrile

NaOH (5.0 N, 80 mL) was added to a mixture of 4-nitrophenylacetonitrile (10.0 g, 61.7 mmol), 1,2-dibromoethane (8.0 mL, 92.5 mmol), and tetraethylammonium chloride hydrate (10.2 g, 61.7 mmol) in 200 mL of CH₂Cl₂ at RT. The resulting mixture was stirred at RT for 24 h, diluted with CH₂Cl₂, and acidified with HCl (10%, aq). The organic layer was separated, washed with brine, condensed, and the crude was purified by flash column chromatography. The titled compound was obtained as a light yellowish solid.

Preparation CLXXXI—C-[1-(4-Nitro-phenyl)-cyclopropyl]-methylamine

The mixture of 1-(4-nitro-phenyl)-cyclopropanecarbonitrile (3.0 g, 15.9 mmol) and borane THF complex (1.0 M solution in THF, 32 mL, 32 mmol) in 50 mL of anhydrous THF was heated at reflux overnight. The mixture was cooled to RT, quenched with 2.5 mL of 50% AcOH aqueous solution, then partitioned between EtOAc and NaHCO₃ (aq). The combined organic portions were washed with brine, dried with MgSO₄, filtered, and condensed. The crude was purified by flash column chromatography (1 to 2% of MeOH in CH₂Cl₂). The titled compound was obtained as a light brownish solid. MS (ES⁺): 192.9. Calc'd for C₁₀H₁₂N₂O₂-192.2.

Preparation CLXXXII—2,2,2-Trifluoro-N-[1-(4-nitro-phenyl)-cyclopropylmethyl]-acetamide

Trifluoroacetic anhydride (5.26 mL, 36.9 mmol) was added to a mixture of C-[1-(4-nitro-phenyl)-cyclopropyl]-methylamine (2.37 g, 12.3 mmol) and triethyl amine (8.6 mL, 61.5 mmol) in 50 mL of CH₂Cl₂ at RT. The resulting mixture was stirred for 2 h. The volatiles were removed under reduced pressure and the residue was partitioned between EtOAc and aqueous NaHCO₃. The organic layer was washed with brine, dired with MgSO₄, filtered, and condensed. The crude compound was purified by flash column chromatography (10 to 20% of EtOAc in hexanes), and the titled compound was obtained as an off-white solid.

Preparation CLXXXIII—1-(7-Nitro-4-spiro-1′-cyclopropane-3,4-dihydro-1H-isoquinolin-2-yl)-2,2,2-trifluoroethanone

A mixture of 2,2,2-trifluoro-N-1-(4-nitro-phenyl)-cyclopropylmethyl)-acetamide (3.10 g, 10.7 mmol) and paraformaldehyde (0.54 g, 17.2 mmol) was added to a mixture of 12 mL of glacial AcOH and 20 mL of H₂SO4 at RT. The resulting mixture was stirred at 40° C. for 12 h, poured into ice-water and extracted with EtOAc. The combined organic portion was washed with NaHCO₃ (aq), H₂O, brine, then dried with MgSO₄, and condensed. The crude compound was purified by flash column chromatography (10 to 20% of EtOAc in hexanes), and the titled compound was obtained as a white solid.

Preparation CLXXXIV—7-Nitro-4-spiro-1′-cyclopropane-1,2,3,4-tetrahydroisoquinoline

A mixture of 1-(7-nitro-4-spiro-1′-cyclopropane-3,4-dihydro-1H-isoquinolin-2-yl)-2,2,2-trifluoroethanone (0.32 g, 1.07 mmol) and K₂CO₃ (1.50 g, 14.2 mmol) in 7 mL of MeOH and 2 mL of H₂O was stirred at RT overnight. The mixture was filtered, and the filtrate was concentrated. The residue was dissolved in EtOAc, washed with NH₄Cl (aq), brine, dried with MgSO₄, filtered, and condensed to give the titled compound as a light yellowish solid. MS (ES⁺): 204.9 (M+H)⁺. Calc'd for C₁₁H₁₂N₂O₂-204.23.

Preparation CLXXXV—tert-Butyl N-[7-nitro-4-spiro-1′-cyclopropane-3,4-dihydro-1H-isoquinoline-2-carbamate

The mixture of 7-nitro-4-spiro-1′-cyclopropane-1,2,3,4-tetrahydroisoquinoline (0.20 g, 0.98 mmol), BOC₂O (0.24 g, 1.08 mmol), DMAP(0.025 g, 0.20 mmol), DIEA (0.51 mL, 2.94 mmol) in 10 mL of CH₂Cl₂ was stirred at RT for 2 h. The solvent was removed, the residue was purified by flash column chromatography (5 to 10% of EtOAc in hexanes), and the titled compound was obtained as a white solid.

Preparation CLXXXVI: tert-Butyl N-[7-amino-4-spiro-1′-cyclopropane-3,4-dihydro-1H-isoquinoline]carbamate

A mixture of tert-butyl N-[7-nitro-4-spiro-1′-cyclopropane-3,4-dihydro-2H-isoquinoline-2-carbamate (0.27 g, 0.89 mmol) and Pd/C (0.05 g, 10% wt) in 15 mL of MeOH was placed under H₂ which was provided by a balloon and stirred at RT for 1.5 h. The mixture was filtered through Celite®, and condensed to give the titled compound as a white solid. MS (ES⁺): 274.8 (M+H)⁺. Calc'd for C₁₆H₂₂N₂O₂-274.36.

Preparation CLXXXVII—4-methyl-6-[2-(1-methyl-ppyrrolidin-2-yl)-ethyl]-pyrimidin-2-ylamine

To a solution of (S)-(−)-1-methyl-2-pyrrolidine (320 mg, 2.78 mmol) in dry THF (10 mL) at 0° C. was added NaH (167 mg, 4.16 mmol). After stirred at RT for 1 h, 2-amino-4-chloro-6-methylpyrimidine (600 mg, 4.16 mmol) in dry THF (10 mL) was added dropwise via the addition funnel. The resulting mixture was heated to reflux under Ar gas for 20 h. The reaction was cooled to RT and quenched with sat. NH₄Cl. Solvent was removed. The residue was partitioned between H₂O and CHCl₃. The organic layer was washed with H₂O, brine, dried over MgSO₄, and evaporated to dryness. This crude compound was purified in column eluted with CH₂Cl₂:MeOH=95%:5% to yield the title compound. MS m/z: 223.2 (M+H). Calc'd. for C₁₂H₂₀N₄-222.2.

Preparation CLXXXVIII—(6-bromo-pyridin-2-yl)3-Methyl-but-2-enoic-amide

To a solution of 2-amino-6-bromopyridine (4, 3.015 g, 0.017 mole) and Et₃N (2.40 mL, 0.017 mole) in CH₂Cl₂ (20.0 mL), was added 3,3-dimethylacryloylchloride (1.96 mL, 0.017 mole) under N₂ at 0° C. The reaction mixture was slowly warmed to RT and stirred for 12 h. The reaction was quenched by the addition of H₂O (20.0 mL). The organic layer was separated, dried over Na₂SO₄ and evaporated to dryness to yield crude compound which was used without purification.

Preparation CLXXXIX—(6-amino-pyridin-2-yl) 3-Methyl-but-2-enoic-amide

To a solution of 2-amino-6-bromopyridine (4.30 g, 0.017 mole) and copper (0.214 g, 3.372 mmol) in IPOH (20.0 mL), was added NH₄OH (20.0 mL) in a sealed vessel under N₂. The reaction was sealed and heated to 90° C. for 12 h. The mixture was cooled to RT and EtOAc (50.0 mL) was added. The organic layer was separated, and the aq layer was washed with EtOAc (50.0 mL). The combined organic layers were evaporated to dryness, the resulting residue was dissolved in CH₂Cl₂ (50.0 mL) and washed with H₂O (4×30 mL). The organic layer was dried over Na₂SO₄ and evaporated to dryness to yield crude compound which was used without purification.

Preparation CXC—7-Amino-4,4-dimethyl-3,4-dihydro-1H-[1,8]naphthyridin-2-one

To a mixture of aminopyridine 6 (1.12 g, 5.833 mmol) and AlCl₃ (3.11 g, 0.023 mole) was added chlorobenzene (10.0 mL) in a sealed vessel under Ar. The reaction was sealed and heated to 120° C. for 12 h. The reaction mixture was cooled to RT and the mixture was poured over ice/HCl mixture and extracted with EtOAc (3×50.0 mL). The Aq layer was neutralized with solid NaHCO₃ and extracted with EtOAc (5×50 mL). The combined organic layers were dried over Na₂SO₄ and evaporated to dryness to yield crude compound which was purified by chromatography (Silica gel, CH₂Cl₂:MeOH, 99:1) yielding the title compound.

Preparation CXCI—2-[1-(3-Amino-phenyl)-2,2,2-trifluoro-1-trifluoromethyl-ethoxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

To a mixture of 2-(3-amino-phenyl)-1,1,1,3,3,3-hexafluoro-propan-2-ol (1.30 g), 2-hydroxymethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (1.04 g), PPh₃ (2.64 g) and molecular sieves 4 Å in THF (100 mL) was added DEAD (1.55 mL) slowly. The reaction was stirred at RT for 4 h and at reflux overnight. After filtration to remove solids, the filtrate was concentrated and the residue was taken up into Et₂O. The organic phase was washed with saturated NaHCO₃ and brine. The organic layer was dried over MgSO₄ and evaporated to give a very viscous brown oil, which was purified by chromatography through silica gel (500 g, 30% to 50% EtOAc in hexanes) to afford 2-[1-(3-amino-phenyl)-2,2,2-trifluoro-1-trifluoromethyl-ethoxymethyl]-pyrrolidine-1-carboxylic acid tert-butyl ester as a light brown oil.

Preparation CXCII—N-(3-Amino-5-chloro-phenyl)-2-dimethylamino-acetamide

To a solution of 5-chloro-benzene-1,3-diamine (3 g, 21 mmol) and dimethylamino-AcOH (2.2 g, 21 mmol) in CH₂Cl₂ (300 mL) was added EDC (5 g, 25 mmol), HOBt (2.9 g, 21 mmol), and DIEA (5 mL). The reaction mixture was stirred at RT overnight. Solvent was removed in vacuo and the residue was purified through flash chromatography on silica gel (0-8% MeOH in EtOAc) to give the desired compound.

General Procedure for the preparation of 2,6-diamonipyridines

To a solution of 2-amino-6-bromopyridine (1.070 g, 6.061 mmol) in 2,4-dimethylphenol (2.0 mL) was added amine (6.667 mmol) and the reaction mixture was heated to 150° C. for 12 h. The mixture was cooled to RT and aq. HCl (2.0 M, 30 mL) was added. EtOAc (50 mL) was added and the organic layer was separated. The Aq layer was washed with EtOAc (2×40 mL) and the combined organic layers were washed with H₂O (50 mL), dried over Na₂SO₄, concentrated under vacuo to yield crude compound which was used without purification.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a) 3,4,5,6-Tetrahydro-2H-[1,2′]bipyridinyl-6′-ylamine:     -   b) 6-(4-Methyl-piperazin-1-yl)-pyridin-2-ylamine:

Preparation CXCIII—2-Methyl-2-(4-nitrophenyl)propionic acid

To a solution of 2-(4-nitrophenyl)propionic acid (50 g, 0.26 mol) in 250 mL of MeOH was added 6 mL of concentrated HCl. The resulting solution was heated at reflux for 16 h. The reaction was diluted with 200 mL of aq. NaHCO₃ and 500 mL of EtOAc. The organic layer was separated, dried over Na₂SO₄, and concentrated. The residue was diluted with 100 mL of THF and added to a suspension of NaH (11.2 g, 0.28 mole, 60% in mineral oil) in 600 mL of THF. To the resulting mixture was added CH₃I (18.3 mL, 0.29 mole) in one portion. The resulting mixture was stirred for 48 h at 40° C. and diluted with aq. NH₄Cl solution and EtOAc. The organic layer was separated, dried over Na₂SO4, and concentrated. The residue was used without further purification.

To a solution of the residue (54 g, 0.24 mole) in 500 mL of MeOH was added 5 N aq. NaOH solution (144 mL, 0.72 mole). The mixture was stirred for 16 h at 40° C., then, concentrated, and the residue was diluted with H₂O (500 mL). The aq. solution was acidified with 2 N HCl to give a precipitate which was filtered and dried to give the titled compound as a yellowish solid. MS: (ES+) 210 (M+H). Calc'd for C₁₀H₁₂NO₄-210.20.

Preparation CXCIV—2-Methyl-5-[1-methyl-1-(4-nitro-phenyl)-ethyl]-[1,3,4]oxadiazole

A mixture of 2-methyl-2-(4-nitro-phenyl)-propionic acid (5 g, 24 mmol) and a few drops DMF in SOCl₂ was stirred at reflux for 16 h. The resulting solution was concentrated to give corresponding acid chloride as a brown solid.

To a mixture of the acid chloride (2.33 g, 10.2 mmol), acetic acid hydrazide (0.91 g, 12.2 mmol), Et₃N (2.86 mL, 20.2 mmol) in CH₂Cl₂ (50 mL) was added 2 crystals of DMAP at RT. The resulting mixture was stirred for 16 h and concentrated. A solution of the residue in 50 mL of POCl₃ was heated at 95° C. for 16 h. The resulting mixture was concentrated and diluted with ice-H₂O and EtOAc. The organic layer was washed with saturated aq. NaHCO₃ solution twice, dried over Na₂SO₄, and concentrated. The residue was purified by SiO₂ chromatography (hexane:EtOAc=1:1) to give the titled compound as a pale yellow crystalline solid. MS: (ES+) 248 (M+H). Calc'd for C₁₂H₁₄N₃O₃-248.10.

Preparation CXCV—2-Methyl-5-[1-methyl-1-(4-amino-phenyl)-ethyl]-[1,3,4]oxadiazole

A mixture of 2-methyl-5-[1-methyl-1-(4-nitro-phenyl)-ethyl]-[1,3,4]oxadiazole (1.36 g, 5.5 mmol) and Pd/C (68 mg) in EtOAc (50 mL) was stirred under 1 atm of H₂ for 16 h. The resulting slurry was filtered over Celite®, and the filtrate was concentrated to give the titled compound as a pale yellow crystalline solid. MS: (ES+) 218 (M+H). Calc'd for C₁₂H₁₆N₃O-218.12.

Preparation CXCVI—4-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-pyrimidine

To a mixture of 1-(4-nitro-phenyl)-propan-2-one (5.32 g, 29.7 mmol), triethylbenzylammonium chloride (0.34 g, 1.5 mmol), and 13 mL of aq. 5N KOH solution (65.3 mmol) in CH₂Cl₂ was added CH₃I (4.06 mL, 65.3 mmol). The resulting mixture was stirred at 40° C. then diluted with EtOAc and H₂O. The organic layer was dried and concentrated.

To the residue (1.0 g, 4.8 mmol) in toluene (30 mL) was added dimethylformamide dimethylacetal (1.27 mL, 9.6 mmol). The resulting mixture was heated at reflux for 6 h, then concentrated to give 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one as a yellow solid. MS: (ES+) 263 (M+H). Calc'd for C₁₄H₁₉N₂O₃-263.13.

A mixture of 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one (0.5 g, 1.9 mmol), formamidine hydrochloride (0.305 g, 3.8 mmol), and NaOEt (1.29 g, 4.0 mmol) was heated in Smith synthesizer under microwave for 10 min at 150° C. The resultant was diluted with H₂O and EtOAc. The organic layer was dried, and the residue was used without further purification. MS: (ES+) 244 (M+H). Calc'd for C₁₃H₁₄N₃O₂—244.10.

Preparation CXCVII—5-[1-Methyl-1-(4-nitro-phenyl)-ethyl]-1H-pyrazole

A mixture of 1-dimethylamino-4-methyl-4-(4-nitro-phenyl)-pent-1-en-3-one (0.36 g, 1.4 mmol) and hydrazine hydrate (1.0 g, 6.25 mmol) in EtOH was heated at 50° C. for 3 h. The mixture was concentrated, and the residue was diluted with H₂O and EtOAc. The organic layer was dried over Na₂SO₄ and concentrated to give the titled compound as a yellow solid. MS: (ES+) 232 (M+H.) Calc'd for C₁₂H₁₄N₃O₂—232.10.

Preparation CXCVIII—2-Methyl-2-(4-nitro-phenyl)-1-pyrrolidin-yl-propan-1-one

To a round bottom flask charged with 2-methyl-2-(4-nitro-phenyl)-propionic acid, was added 6.5 mL of SOCl₂. The mixture was heated to 80° C., with stirring under inert atmosphere for 3.5 h. The mixture was cooled to RT, and then dried in vacuo. The residue was placed under high vacuum. After completely dry, the residue was used without further purification.

To the residue was added 10 mL of CH₂Cl₂, along with Et₃N and the mixture was cooled to 0° C. on an ice/H₂O bath. Pyrrolidine 0.46 mL (1.25 eq.) was added into the mixture, then stirred to RT under inert atmosphere. After 3 h of stirring, the mixture was quenched with H₂O, diluted with CH₂Cl₂, and transferred to a separatory funnel. The organics were collected, combined, dried over Na₂SO₄ and filtered. The crude was concentrated in vacuo. After drying, the title compound was produced as an amorphous solid. MS: 263 (M+1); calc'd for C₁₄H₁₈N₂O₃-262

Preparation CXCIX—4-(1,1-Dimethyl-2-pyrrolidin-1-yl-ethyl-phenylamine

To a 3-neck round bottom flask, charged with 2-Methyl-2-(4-nitro-phenyl)-1-pyrrolidin-yl-propan-1-one was added 66 mL of 1M BH₃/THF soln, while the mixture was maintained at 0° C. on an ice/H₂O bath. The mixture was stirred under inert atmosphere overnight. A couple drops of 5 N NaOH was added slowly to the reaction mixture for quenching. After stirring an additional 5 min, 22 mL of 5 N NaOH was added into the reaction mixture, then stirred vigorously for 3 h. The mixture was diluted with 50 mL of 1N NaOH and 100 mL of EtOAc, then transferred into a sep. funnel. The organics were collected and concentrated in vacuo. The residue was dissolved in CH₂CL₂, then NaHCO₃ soln. was added into the mixture the organic extracts were dried over Na₂SO₄, filtered, then concentrated in vacuo.

To a round bottom flask charged with Pd/C in MeOH under inert atmosphere, was added 1-[2-methyl-2-(4-nitro-phenyl)-propyl]-pyrrolidine in MeOH and H₂ was added while stirring vigorously overnight. The mixture was filtered through Celite® and concentrated in vacuo to yield a light yellow oil. MS: 219 (M+1); calc'd for C₁₄H₂₂N₂.

Preparation CC—1-methyl-1-(4-nitro-phenyl)-ethylamine

To a round bottom flask charged with 2-methyl-2-(4-nitro-phenyl)-propionic acid (10 g; 0.0440 mole), was added SOCl₂ (32 mL). The mixture was heated to reflux, until completion of the reaction. After heating, the residual SOCl₂ was removed by in vacuo, then placed the residue on high vac. The crude was used without further purification.

To the residue, was added 20 mL toluene and stirred. Then slowly NaN₃ (7.14 g; 0.1099 mole) was added into the mixture, and stirred vigorously under inert atmosphere for 1.5 h. The mixture was poured into 50 mL H₂O and transferred into a sep. funnel, with 50 mL EtOAc. The organics were collected, dried, filtered, and concentrated in vacuo. The residue was dissolved in toluene and heated to 100° C. while stirring vigorously under inert atmosphere for 1 h. The solvent was removed in vacuo, 20% HCl aq was added and the mixture stirred vigorously under reflux conditions at 100° C. for 9 h. The mixture was evaporated in-vacuo and to the residue was added 50 mL of 5 N NaOH and 80 mL EtOAc, then transferred the mixture to a sep. funnel. The organic layer was collected, dried, filtered, and conc. in vacuo. The residue was purified on silica-gel column in a solvent gradient of 80% EtOAc/Hexanes to 10% MeOH/CH₂CL₂ yielding a brown solid resulted. MS: 181 (M+1); calc'd for C₉H₁₂N₂O₂-180.

Preparation CCI—[1-(4-Amino-phenyl)-1-methyl-ethyl]-(2-methylsulfanyl-pyrimidin-4-yl)-amine

To a Personal Chemistry reaction tube, was added 1-methyl-1-(4-nitro-phenyl)-ethylamine, along with 4-chloro-2-methylsulfanyl-pyrimidine, DIEA (2.0 eq) and t-BuOH (0.6 mL). The tube was heated by microwave to 150° C. for 10 min. After heating, the crude was diluted with CH₂CL₂ and H₂O, then transferred into a sep. funnel. The organics were collected, dried over Na₂SO₄, then concentrated in vacuo. The crude was used without further purification.

To a round bottom flask charged with PtO₂ (12% wt.) in MeOH (5 mL), was added crude nitro-intermediate (0.170 g; 0.0006 mole). The mixture was stirred vigorously under H₂ for 2.5 h. The mixture was filtered through Celite® and concentrated in vacuo. The desired material was purified by silica-gel chromatography in a solvent gradient of 80% EtOAc/Hexanes to 5% MeOH/CH₂CL₂. After drying in high vacuum, the title compound resulted as a light yellow amorphous solid.

Preparation CCII—2-(2,2,2-Trifluoro-ethoxy)-isonicotinonitrile

To the suspension of NaH (2.78 g, 0.11 mole) in THF 100 mL) 2,2,2-trifluoroethanol (10 g, 0.1 mole) was added slowly. The mixture was stirred at RT till it turned clear. A solution of 2-chloro-isonicotinonitrile (13.8 g, 0.1 mole) in THF (100 mL) was slowly added and stirred at reflux for 3 h. After filtration and concentration, the crude oily compound was purified through column chromatography providing pure compound as an oil.

Preparation CCIII—C-[2-(2,2,2-Trifluoro-ethoxy)-pyridin-4-yl]-methylamine hydrogen chloride

A mixture of 2-(2,2,2-trifluoro-ethoxy)-isonicotinonitrile (3.90 g, 19.40 mmol), 12 N HCl(8.0 mL) and 10% Pd/C (800 mg) in MeOH (100 mL) was stirred under a balloon of H₂ for 7 h. After filtration, the filtrate was concentrated to give compound as a white solid. MS (ES+): 206.9 (M+H)⁺. Calc'd. for C₈H₉F₃N₂O-206.07.

Preparation CCIV—2-Bromomethyl-3-nitro-benzoic acid methyl ester

The mixture of methyl 2-methyl-3-nitro benzoate (5.06 g, 25.9 mmol), NBS (5.54 g, 31.1 mmol), and AIBN (0.43 g, 2.59 mmol) in 100 mL of anhydrous CCl₄ was heated at reflux under N₂ for 22 h, cooled to RT, diluted with EtOAc, and washed with Na₂CO₃ (aq). The organic portion was separated, washed with brine, dried with Na₂SO₄, filtered, and condensed. The crude material was purified by flash column chromatography to yield pure product, which was used without further purification.

Preparation CCV—4-Nitro-2, 3-dihydro-isoindol-1-one

NH₃ (2.0 M in MeOH, 50 mL) was slowly added to the solution of 2-bromomethyl-3-nitro-benzoic acid methyl ester (4.46 g, contaminated with a small amount of assumed starting material, 16.3 mmol) in 30 mL of MeOH at RT. The resulting mixture was stirred at RT overnight, to provide the title compound as a white solid. MS (ES⁺): 179.2 (M+H)⁺. Calc'd for C₈H₆N₂O₃-178.14.

Preparation CCVI—4-Amino-2, 3-dihydro-isoindol-1-one

To the suspension of 4-nitro-2,3-dihydro-isoindol-1-one (2.40 g, 13.5 mmol) in 100 mL of MeOH was added Pd/C (10 wt %%, 0.36 g). The mixture was then placed under H₂ from a balloon, stirred at RT for 24 h, filtered through Celite®, and condensed to give the titled compound as a light greenish solid. MS (ES⁺): 149.1 (M+H)⁺. Calc'd for C₈H₈N₂O-148.16.

Preparation CCVII—Pyridin-4-ylmethyl-carbamic acid tert-butyl ester

Boc anhydride (23 g, 105 mmol) was carefully added to a solution of pyridin-4-yl-methylamine (11 g, 102 mmol) and DMAP (0.5 g, 4 mmol) in CH₂CL₂ (150 mL). The reaction was extended for 1 hr after the addition. The reaction mixture was concentrated in vacuo and the residue was recrystallized in EtOAc to afford an off white crystal as the desired compound.

Preparation CCVIII—(1-Oxy-pyridin-4-ylmethyl)-carbamic acid tert-butyl ester

Pyridin-4-ylmethyl-carbamic acid tert-butyl ester (2.1 g, 10 mmol) was dissolved in a one to one mixture of aqueous MeOH (200 mL) with NaHCO₃ (5 g, 60 mmol) and Oxone® (12.3 g, 20 mmol). The mixture was stirred overnight then concentrated in vacuo to remove MeOH. The resulted aqueous mixture was diluted with H₂O (150 mL) and filtered. The filter cake was washed with H₂O and dried to afford a white solid as the desired compound.

Preparation CCIX—C-(1-Oxy-pyridin-4-yl)-methylamine

Oxy-pyridin-4-ylmethyl)-carbamic acid tert-butyl ester (2.1 g, 9.4 mmol) was dissolved in a 4 N HCl in dioxane solution (50 mL) and heated to 50° C. for 2 h. After removing solvent in vacuo, a white solid was received as an HCl salt of the desired compound.

Preparation CCX—2-(4-Methoxy-benzylamino)-isonicotinonitrile

To pyridine (500 mL) were added 2-chloroisonicotinonitrile (22.0 g, 159 mmol), para-methoxybenzylamine (25 g, 114% Meq.), and NaHCO₃ (30 g). The mixture was heated under reflux overnight. After cooling to RT, the mixture was filtered and the filter cake was rinsed with CH₂Cl₂. The combined filtrate was concentrated to dryness in vacuum to form a yellow solid. This solid is then recrystalized in EtOAc to give a light yellow crystalline compound and the mother liquor was concentrated and subjected to EtOAc again (repeating three times) to yield the desired compound.

Preparation CCXI—(4-Aminomethyl-pyridin-2-yl)-(4-methoxy-benzyl)-amine

2-(4-Methoxy-benzylamino)-isonicotinonitrile (12 g, 50 mmole) was dissolved in a mixed solvent of EtOH (800 mL) Et₃N (200 mL) and suspended with 2 g of Pd/C (10%). After removing air with vacuum, the flask was charged with H₂ with a balloon. The H₂ balloon was refilled every morning and evening. Pd/C was recharged twice (1.3 g each) on days 2 and 3. Reaction was completed on the 4^(th) day and the reaction mixture was filtered through a pad of Celite®. The filter cake was rinsed with MeOH and the combined filtrate was concentrated in vacuo to give the desired compound as a light brown solid.

Preparation CCXII—4-Aminomethyl-pyridin-2-ylamine

(4-Aminomethyl-pyridin-2-yl)-(4-methoxy-benzyl)-amine (12 g, 50 mmol) was dissolved in TFA (150 mL) and heated to reflux for 1 h. After cooling, the reaction mixture was concentrated in vacuum and the residue was partitioned between HCl (1 N, aq.) and EtOAc. The aqueous layer was washed with EtOAc then hexanes and concentrated to dryness in vacuum to give an off white solid as a dihydrochloric salt.

Preparation CCXIII—2-Methylamino-isonicotinonitrile

To a solution of 2-chloroisonicotinonitrile (22.0 g, 159 mmole) in pyridine (500 mL) was added methylamine in THF (2 N, 160 mL), and NaHCO₃ (54 g). The mixture was heated to 120° C. in a sealed vessel for 40 h. After cooled to RT, the mixture was filtered and the filter cake was washed with CH₂Cl₂. The combined filtrated was concentrated in vacuo to give a yellow solid (21 g) as the desired compound.

Preparation CCXIV—(4-Aminomethyl-pyridin-2-yl)-methyl-amine

A suspension of 2-Methylamino-isonicotinonitrile (5.6 g) and Pd/C (10%, 4 g) in EtOH (150 mL) and TEA (40 mL) was placed in a 500 mL Parr Hydrogenation bottle and hydrogenated under 60 psi of H₂ over night. After filtering through a pad of Celite®, the reaction mixture was concentrated in vacuo to give a yellow oil as the desired compound.

Preparation CCXV—3-Fluoro-pyridine 1-oxide

3-Chloroperoxybenzoic acid (70%, 35.0 g, 142 mmol) was added to the solution of 3-fluoropyridine (6.90 g, 71.1 mmol) in 200 mL of CH₂Cl₂, the mixture was stirred at RT overnight, washed with a small amount of saturated NaHCO₃ solution, dried with Na₂SO₄, filtered, condensed, the crude compound was purified by flash column chromatography (1 to 2% of MeOH in CH₂Cl₂), the titled compound was obtained as a light yellowish solid. MS (ES⁺): 114.1 (M+H)⁺. Calc'd for C₅H₄FNO-113.09.

Preparation CCXVI—3-Fluoro-pyridine-2-carbonitrile

The mixture of 3-fluoro-pyridine 1-oxide (0.99 g, 8.75 mmol), trimethylsilyl cyanide (4.80 mL, 35.0 mmol), and triethyl amine (1.84 mL, 13.2 mmol) in 100 mL of CH₃CN was heated at reflux overnight. The solvents were removed, under reduced pressure and the residue was partitioned between EtOAc and saturated NaHCO₃. The organic portion was separated, dried with Na₂SO₄, filtered, condensed, the crude compound as purified by flash column chromatography (10 to 20% of EtOAc in hexanes). The titled compound was obtained as a light yellowish solid. MS (ES⁺): 123.1 (M+H)⁺. Calc'd for C₆H₃FN₂-122.10.

Preparation CCXVII—C-(3-Fluoro-pyridin-2-yl)-methylamine

The mixture of 3-fluoro-pyridine-2-carbonitrile (0.81 g, 6.63 mmol) and Pd/C (0.20 g, 10% wt) in 10 mL of MeOH and 2.7 mL of concentrated HCl was placed under H₂ which was provided by a balloon and stirred at RT for 4 h, filtered through Celite®, condensed, the residue was purified by flash column chromatography, 0.13 g of the titled compound was obtained as a light yellowish oil. MS (ES⁺): 127.1 (M+H)⁺. Calc'd for C₆H₇FN₂-126.13.

Preparation CCXVIII: 5-Bromo-pyridine-2-carbonitrile

The mixture of 2,5-dibromopyridine (4.74 g, 20.0 mmol), zinc cyanide (1.40 g, 12.0 mmol), zinc dust (0.059 g, 0.90 mmol), and Pd(dppf)Cl₂.CH₂Cl₂ (0.36 g, 0.44 mmol) in 25 mL of DMF was heated at reflux for 5 h, cooled to RT, diluted with H₂O, extracted with EtOAc, the organic portion was washed with brine, the solvents were removed, the crude compound was purified by flash column chromatography (5 to 15% of EtOAc in hexanes), the titled compound was obtained as an off-white solid.

Preparation CCXIX—5-Fluoro-pyridine-2-carbonitrile

The mixture of 5-bromo-pyridine-2-carbonitrile (0.50 g, 2.73 mmol), and KF (0.48 g, 8.20 mmol) in 10 mL of 1-methyl-2-pyrrolidinone was stirred at 175° C. for 18 h, cooled to RT, diluted with H₂O, extracted with EtOAc, the combined organic portions were washed with H₂O, brine, dried with Na₂SO₄, filtered, condensed, the crude compound was purified by flash column chromatography (5 to 20% of EtOAc in hexanes). The titled compound was obtained as an off-white solid.

Preparation CCXX—C-(5-Fluoro-pyridin-2-yl)-methylamine

The mixture of 5-fluoro-pyridine-2-carbonitrile (0.16 g, 1.27 mmol) and Pd/C (0.030 g, 10% wt) in 15 mL of MeOH and 0.50 mL of concentrated HCl was placed under H₂ which was provided by a balloon and stirred at RT for 4 h, filtered through Celite®, condensed, the residue was purified by flash column chromatography. The titled compound was obtained as a light yellowish solid. MS (ES⁺): 127.2 (free base) (M+H)⁺. Calc'd for C₆H₇FN₂ (free base)-126.13.

Preparation CCXXI—1H-Pyrrolo[2,3-b]pyridine 7-oxide

To a suspension of 1H-pyrrolo[2,3-b]pyridine (10.0 g) and NaHCO₃ (45.2 g) in 1:1 MeOH/H₂O (1000 mL) was added Oxone® (106 g) in potions during 40 min period. The mixture was stirred at RT for 5 h. The sold was removed by filtration and the filtrate was concentrated to 200 mL in volume. This aqueous phase was extracted with CH₂Cl₂ (200 mL×7) to afford 1H-pyrrolo[2,3-b]pyridine 7-oxide.

Preparation CCXXII—4-chloro-1H-pyrrolo[2,3-b]pyridine

To a cooled POCl₃ (50 mL) in a dried round bottom flask, 1H-pyrrolo[2,3-b]pyridine 7-oxide (5.73 g, Step A) was added in potions. The mixture was heated to reflux for 5 h. After cooled down to RT, POCl₃ was evaporated under high vacuum under gentle heating (40-50° C.) to obtain black residue. 50 mL of H₂O was added slowly and pH was adjusted to 8-9 with Na₂CO₃ (first with solid, then saturated aqueous solution). The resulting precipitate was collected by filtration, washed with cold H₂O and dried in a vacuum oven (50° C.) to give 4-chloro-1H-pyrrolo[2,3-b]pyridine as tan powder.

Preparation CCXXIII—1-(4-iodo-pyrrolo[2,3-b]pyridin-1-yl)-ethanone

To a suspension of 4-chloro-1H-pyrrolo[2,3-b]pyridine (3.80 g, step B) and NaI (19.15 g) in CH₃CN (40 mL) was added acetyl chloride (5.0 mL) slowly. The mixture was heated to reflux for overnight. After cooled to RT, 40 mL of 10% Na₂CO₃ and 40 mL of 10% NaHSO₃ were added. After stirring for 15 min, the mixture was extracted with EtOAc 4 times. The combined organic phases were washed with brine, dried over MgSO₄ and concentrated to give a brown residue as the crude compound, which was purified by chromatography through silica gel (220 g, 5 to 15% EtOAc/hexanes to afford 1-(4-iodo-pyrrolo[2,3-b]pyridin-1-yl)-ethanone as white solid.

Preparation CCXXIV—1-acetyl-1H-pyrrolo[2,3-b]pyridine-4-carbonitrile

A mixture of 1-(4-iodo-pyrrolo[2,3-b]pyridin-1-yl)-ethanone (4.30 g, Step C), CuCN (6.841 g), Pd₂dba₃ (0.729 g), and dppf (1.636 g) in 85 mL of dioxane was heated to reflux for 2 h. Solid was removed by filtration through a pad of Celite®. The filtrate was concentrated to give a yellow solid as crude compound, which was purified by chromatography through silica gel (250 g, 5-30% EtOAc/hexanes, stepwise gradient) to afford 1-acetyl-1H-pyrrolo[2,3-b]pyridine-4-carbonitrile as a white fluffy solid.

Preparation CCXXV—1-(4-aminomethyl-pyrrolo[2,3-b]pyridin-1-yl)-ethanone

A mixture of 1-acetyl-1H-pyrrolo[2,3-b]pyridine-4-carbonitrile (0.872 g, step D), 10% Pd/C (0.882 g), 20 mL of Et₃N, and 80 mL of EtOH was stirred at RT under balloon pressure of H₂ for overnight. Solid was removed by filtration through a pad of Celite® and the filtrate was concentrated to yield a cream color residue, which was purified by chromatography through silica gel (70 g, 2 to 5% MeOH/CHCl₃ with 1% NH₄OH) to afford 1-(4-aminomethyl-pyrrolo[2,3-b]pyridin-1-yl)-ethanone as a white solid.

Preparation CCXXVI—N-(1-acetyl-2,3-dihydro-1H-pyrrolo[2,3-b]pyridin-4-ylmethyl)-acetamide

To a mixture of 1-acetyl-1H-pyrrolo[2,3-b]pyridine-4-carbonitrile (0.691 g, Example 15, Step D), 10% Pd/C (0.702 g), 5 mL of Et₃N, and 20 mL of EtOAc was added acetic anhydride (1.0 mL). The mixture was stirred at RT under balloon pressure of H₂ for overnight. Solid was removed by filtration through a pad of Celite® and the filtrate was concentrated to yield a white residue, which was purified by chromatography through silica gel (150 g, 1 to 5% MeOH/CHCl₃ with 1% NH₄OH, stepwise gradient) to afford N-(1-acetyl-2,3-dihydro-1H-pyrrolo[2,3-b]pyridin-4-ylmethyl)-acetamide (0.50 g) as white solid.

Preparation CCXXVII—C-(2,3-dihydro-1H-pyrrolo[2,3-b]pyridin-4-yl)-methylamine hydrogen chloride salt

A mixture of N-(1-acetyl-2,3-dihydro-1H-pyrrolo[2,3-b]pyridin-4-ylmethyl)-acetamide (0.50 g, Step A), HCl (conc., 3 mL) and EtOH (12 mL) was heated to 70° C. for overnight. Additional 3 mL of conc. HCl was added to the reaction and the heating was continued for 3 more days. Solvent was evaporated to give a white residue as crude C-(2,3-dihydro-1H-pyrrolo[2,3-b]pyridin-4-yl)-methylamine HCl salt, which was used without further purification.

General Procedure for the Preparation of 2-amino-4-methylaminopyridines Preparation CCXXVIII—2-aminoisonicotinonitrile

To a slurry of 2-chloro-4-cyanopyridine (10.00 g, 0.079 mole) and sodiumbicarbonate (19.92 g, 0.237 mole) in amine (0.174 mole) was added pyridine (35.0 mL) and the reaction was heated to 90° C. for 3 h. The reaction was then cooled to RT, diluted with the addition of CH₂Cl₂ (100 mL) and filtered. The solid was washed with EtOAc. Combined washes were concentrated in vacuo. A mixture of MeOH/hexanes was added and kept in the fridge for 12 h. The crystals that formed were filtered and washed with hexanes.

Preparation CCXXIX—2-amino-4-methylaminopyridine

To a mixture of 2-aminoisonicotinonitrile (0.043 mole) and Pd/C (10%, 6.00 g) was added Et₃N (40.0 mL) and EtOH (160.0 mL)in a parr bottle and hydrogenated at 50 psi for 12 h. Crude mixture was filtered through Celite®, concentrated under vacuo and dried under high vacuum to yield compound.

Preparation CCXXX—(2-Pyrrolidin-1-yl-pyridin-4-yl)-methylamine

Prepared according to the general procedure with pyrrolidine as the amine.

Preparation CCXXXI—(2-Morpholin-4-yl-pyridin-4-yl)-methylamine

Prepared according to the general procedure with morpholine as the amine.

Preparation CCXXXII—3,9,9-Trimethyl-6-nitro-4,9-dihydro-3H-3-aza-fluorene

4-[1-(2-Bromo-4-nitro-phenyl)-1-methyl-ethyl]-1-methyl-1,2,3,6-tetrahydro-pyridine (9 g), Pd(OAc)₂ (900 mg), and DIEA (15 mL) was dissolved in DMF (300 mL), and heated to 80° C. overnight. Solvents were removed in vacuo. The residue was partitioned between CH₂Cl₂/NaHCO₃(sat, aq.). The CH₂Cl₂ layer was washed with brine, dried over Na₂SO₄ and concentrated in vacuo. The residue was purified via flash chromatography on silica to give the desired compound. (MS: M+H=257).

Preparation CCXXXIII—3,9,9-Trimethyl-2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluoren-6-ylamine(156)

3,9,9-Trimethyl-6-nitro-4,9-dihydro-3H-3-aza-fluorene (700 mg) was dissolved in EtOH (20 mL) with aqueous HCl (1 N, 5 mL) and suspended with Pd/C (10%, 100 mg). The flask was capped with a balloon filled with H₂. The reaction was completed in 6 h at RT. The reaction mixture was filtered through a layer of Celite® with MeOH. The combined filtrate was concentrated to give desired compound. (MS: M+H=231).

Preparation CCXXXIV—2-Chloro-5-nitro-phenol

A mixture of 2-chloro-4-nitroanisole (10 g, 53.3 mmol) and pyridinium chloride (50 g, 426 mmol) was heated at 200° C. for 3 h. After cooling to RT, the mixture was dissolved in 150 mL of aqueous 2 N HCl and 150 mL of EtOAc. The organic phase was separated and was washed with aqueous 2 N HCl (2×100 mL). The resulting organic phase was dried over MgSO₄ and concentrated in vacuo. The title compound was obtained via chromatography (silica gel, 10:1 hexane/EtOAc) as a yellow solid.

Preparation CCXXXV—3-(2-Chloro-5-nitro-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester

To the mixture of 2-chloro-5-nitro-phenol (1.31 g, 7.54 mmol) and K₂CO₃ (1.57 g, 11.31 mmol) in 20 mL of DMF was added 3-methanesulfonyloxymethyl-azetidine-1-carboxylic acid tert-butyl ester (2.0 g, 7.54 mol). The reaction mixture was stirred at 50° C. for 1 h. After cooling to room temperature, the reaction mixture was diluted in 100 mL of EtOAc and quenched with 50 mL of water. The organic layer was separated and the aqueous layer was extracted with EtOAc (2×50 mL). The combined organic phases were washed with brine, dried over MgSO₄ and concentrated in vacuum. The title compound was obtained via column chromatography (silica gel, 1;1 hexane/EtOAc) as yellow oil with 93% yield.

Preparation CCXXXVI—3-(5-Amino-2-chloro-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester

To a solution of 3-(2-chloro-5-nitro-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester (2.5 g, 7.29 mmol) in 60 mL of MeOH/H₂O (1:1) and 3 mL of acetic acid (J. T. Baker) was added Zn powder (2.3 g, 36.47 mmol, Aldrich) at 0° C. The reaction mixture was stirred at 0° C. for 2 h then stirred at 10° C. for 2 h. The resulting mixture was filtered through a Celite® pad and the filtrate was concentrated in vacuo. The residue was treated with 60 mL of saturated aqueous NaHCO₃ and extracted with EtOAc (3×50 mL). The combined organic layers were washed with brine and dried with MgSO₄. The resulting solution was concentrated in vacuo and the title compound was obtained by column chromatography (silica gel, EtOAc) as a yellow solid.

Preparation CCXXXVII: 3-(Benzotriazol-1-yloxy)-6-chloro-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide

A mixture of 3,6-dichloropyridazine-4-carboxylic acid (1.00 g, 5.18 mmol), 4-tert-butylaniline (0.92 mL, 5.60 mmol), TBTU (1.75 g, 5.44 mmol), and DIEA (1.80 mL, 10.4 mmol) in 7.5 mL of anhydrous DMF was stirred at RT under N₂ overnight. The mixture was diluted with H₂O, extracted with EtOAc, and the combined organic portions were washed with brine, dried with Na₂SO₄, filtered, and condensed. The crude compound was purified by flash column chromatography (hexanes/EtOAc/CH₂Cl₂, 9:0:1 to 7:2:1), to provide the desired compound as a light yellowish solid. MS (ES⁺): 423.0 (M+H)⁺. Calc'd for C₂₁H₁₉ClN₆O₂-422.87.

Preparation CCXXXVIII—3-Hydroxymethyl-azetidine-1-carboxylic acid benzyl ester

To a mixture of azetidine-1,3-dicarboxylic acid monobenzyl ester (6.4 g) in THF (200 mL) was added BH₃●THF (6 eq, 163 mL, 1 M solution) dropwise via an addition funnel at −40° C. under an N₂ atmosphere. The solution was warmed to RT and stirred overnight. To the reaction, 5 N NaOH (50 mL) was added and then concentrated under vacuum. The resulting aqueous solution was extracted with Et₂O (3×100 mL). The organic layer was dried over Na₂SO₄ and evaporated to give the title compound which was used without further purification.

Preparation CCXXXIX—3-Methanesulfonyloxymethyl-azetidine-1-carboxylic acid benzyl ester

3-Hydroxymethyl-azetidine-1,3-dicarboxylic acid monobenzyl ester (6.6 g) was dissolved in CH₂Cl₂ (100 mL) and brought to −15° C. While stirring, TEA was added (3 eq, 9.43 g) followed by methanesulphonic chloride (2.0 eq, 7.69 g) and allowed to come to RT and stirred for 1 h. The resulting organic solution was extracted with water (3×100 mL). The organic layer was dried over Na₂SO₄ and evaporated to give the desired product as a clear oil which was used without further purification.

Preparation CCXL—3-Nitro-5-trifluoromethyl-phenol

A flask containing 1-Methoxy-3-nitro-5-trifluoromethyl-benzene (10 g) and hydrochloride pyridine (10 eq, 52.0 g) was heated to 210 C and stirred for 12 h. Once complete, the reaction was cooled and the residue was dissolved in CH₂Cl₂ and washed twice with water (100 mL). The organic layer was concentrated under vacuum and then set in the freezer overnight. The resulting crystalline product was filtered off and washed with ether and used as is.

Preparation CCXLI—3-(3-Nitro-5-trifluoromethyl-phenoxymethyl)-azetidine-1-carboxylic acid benzyl ester

A mixture of 3-nitro-5-trifluoromethyl-phenol (750 mg, Step C), K₂CO₃ (3 eq., 1.5 g) and 3-hydroxymethyl-azetidine-1-carboxylic acid benzyl ester (1.1 eq., 1.2 g) in DMF was heated to 80 C for 1 h. The solution was cooled to RT then filtered and concentraced under vacuum. The residue was dissolved in CH₂Cl₂ and washed with H₂O twice, followed by brine. The organic layer was dried over Na₂SO₄ and evaporated under reduced pressure. The residue was purified by column chromatography using 5% MeOH/CH₂Cl₂ to provide the desired compound as a colorless solid.

Preparation CCXLII—3-(3-amino-5-trifluoromethyl-phenoxymethyl)-azetidine-1-carboxylic acid benzyl ester

To a solution of 3-(3-nitro-5-trifluoromethyl-mg) and NH₄Cl (1.1 eq., 80 mg) was added iron dust (3 eq., 220 mg) in a 10% water/EtOH solution. The solution was heated to reflux for 6 h. The solution was cooled, then filtered through a pad of Celite®. The resulting solution was concentrated under vacuum to provide the desired compound as a dark yellow solid and used as is.

Preparation CCXLIII—3-nitro-5-(trifluoromethyl)phenylamine

To a solution of 3,5-dinitrobenzotrifluoride (10 g, 42 mmol, 1 eq.) in 150 mL of EtOH was added 17.6 mL (258.3 mmol, 6.15 eq.) of ammonium sulfide in water (50% by weight, Aldrich). The reaction was heated to reflux for 16 h during which time it became orange and a yellow precipitate formed. After cooling the volume was reduced to approximately 50 mL. The solid was removed by filtration and the filtrate evaporated to dryness in vacuo. The resulting orange solid was purified by column chromatography eluting with a step gradient of 20-30% EtOAc:hexane to provide the compound as a yellow/orange solid.

Preparation CCXLIV—N-(3-nitro-5-(trifluoromethyl)phenyl) methanesulfonamide

3-Nitro-5-(trifluoromethyl)phenylamine (2 g, 9.7 mmol, 1 eq) was dissolved in 100 mL of CH₂Cl₂. The yellow solution was cooled to 0° C. Et₃N (2 mL, 14.55 mmol, 1.5 eq) was added followed by mesyl chloride (0.75 mL, 9.7 mmol, 1 eq). The reaction was stirred for 2 h at 0° C. and warmed to RT. Pyridine (0.785 mL, 9.7 mmol, 1 eq) and a catalytic amount of dimethylamine pyridine were added. The reaction was stirred at RT for 16 h. An additional equivalent of mesyl chloride was added and the reaction was heated to reflux for 24 h. After cooling, the solvent was removed in vacuo, and the residue redissolved in CH₂Cl₂. The solution was washed twice with 2 N HCl and once with brine. After drying over Na₂SO₄, the solution was filtered and the solvent removed. The resulting solid was triturated briefly with 10% EtOAc:hexane to provide a white solid that was a mixture of sulfonimide and sulfonimide.

The above mixture was dissolve in 20 mL of MeOH that had been saturated with K₂CO₃. After 30 min the reaction was stripped and the resulting solid portioned between 2 N HCl and CH₂Cl₂. The CH₂Cl₂ was dried over Na₂SO₄ and stripped to provide and off-white solid.

Preparation CCXLV—(3S)-tetrahydro-3-furanyl 3-nitro-5-(trifluoromethyl)phenylcarbamate

3-(S)-Hydroxytetrahydrofuran (4.8 mL, 60.7 mmol, 5 eq) was dissolved in 60 mL of toluene. The solution was cooled to 0° C. and Et₃N (5.1 mL, 36.4 mmol, 3 eq) was added. Trichloromethyl chloroformate (3.65 mL, 30.33 mmol, 2.5 eq) was added slowly. The solution was stirred at 0° C. for 45 min. 3-Amino-5-ntrobenzotrifluoride (2.5 g, 12.13 mmol, 1 eq) was added dropwise in 20 mL of toluene. The reaction was stirred at 0° C. for 1 h. An additional 5 eq of 3-(S)-hydroxytetrahydrofuran was converted to the chloroformate as described above, and added to the reaction mixture. After an additional h at 0° C., the reaction was heated to 60° C. for 1 h. The reaction was cooled to RT and concentrated. The residue was dissolved in EtOAc, washed twice with saturated NH₄Cl and once with brine. After being dried over Na₂SO₄ the solution was filtered and the solvent removed in vacuo. The crude product was purified using a Biotage chromatography system eluting with a gradient of 5% to 35% EtOAc:hexane to yield the desired compound.

Preparation CCXLVI—N-(2-((3-nitro-5-(trifluoromethyl)phenyl)oxy)ethyl)-methanesulfonamide

2-((3-Nitro-5-(trifluoromethyl)phenyl)oxy)ethylamine (4.05 g, 16.2 mmol, 1 eq) was dissolved in 100 mL of CH₂Cl₂. The solution was cooled to 0° C. Pyridine (2.6 mL, 32.4 mmol, 2 eq) was added followed by mesyl chloride (1.25 mL, 16.2 mmol, 1 eq). The reaction was stirred for 18 h during which time it was warmed slowly to RT. The solvent was removed in vacuo, and the residue dissolved in EtOAc. The resulting solution was washed twice with 2 N HCl, once with water, and 3× with brine. After being dried over Na₂SO₄ the solution was filtered and concentrated. The crude was purified by silica gel chromatography eluting with 50% to 60% EtOAc:hexane to yield the desired compound.

Preparation CCXLVII—N-(2-((3-amino-5-(trifluoromethyl)phenyl)oxy)ethyl)methanesulfonamide

N-(2-((3-Nitro-5-(trifluoromethyl)phenyl)oxy)ethyl)-methanesulfonamide (1.7 g, 5.2 mmol, 1 eq) was dissolved in 50 L of MeOH. 10% Pd/C (170 mg, 10 weight %) was added and the reaction sparged with H₂. The suspension was stirred for 5 h, then filtered trough Celite®. The filtrate was stripped to yield the title compound.

The following compounds were prepared similarly to the procedure outlined above:

-   -   a)         3-((((2R)-1-acetyl-2-pyrrolidinyl)methyl)oxy)-5-(trifluoromethyl)phenylamine.     -   b) (3S)-tetrahydro-3-furanyl         3-amino-5-(trifluoromethyl)phenylcarbamate.     -   c) N-(3-amino-5-(trifluoromethyl)phenyl)-methanesulfonamide.

Preparation CCXLVIII—(2R)-1-acetyl-2-(((3-nitro-5-(trifluoromethyl)phenyl)oxy)methyl)pyrrolidine

(2R)-2-(((3-nitro-5-(trifluoromethyl)phenyl)oxy) methyl)pyrrolidine (3.46 g, 11.9 mmol, 1 eq) was dissolved in 100 mL of CH₂Cl₂. Et₃N (5 mL, 35.7 mmol, 3 eq) was added followed by Ac₂O (1.2 mL, 13.1 mmol, 1.1 eq). The reaction was stirred at RT for 1.5 h. The solvent was removed in vacuo and the residue dissolved in EtOAc. The solution was washed once each with saturated NH₄Cl, 1 N HCl, and twice with brine. The organic layer was dried over Na₂SO₄ filtered and concentrated in vacuo. The crude material was purified on a Biotage chromatography system eluting with a gradient of 10% to 75% EtOAc:hexane to yield the title compound.

EXAMPLE 1

N-(4-Chlorophenyl){3-[benzylamino](2-pyridyl)}carboxamide Step A—Preparation of (3-amino-(2-pyridyl))-N-(4-chlorophenyl)carboxamide

To a mixture of 3-aminopicolinic acid (552 mg, 4.0 mmol, 1.0 eq) and 4-chloroaniline (1.02 g, 8.0 mmol, 2.0 eq) in CH₂Cl₂was added EDC (1.2 eq), HOBt (0.5 eq) and TEA (1.2 eq). The reaction was stirred at RT overnight, diluted with CH₂Cl₂, washed with NH₄Cl, dried over Na₂SO₄, filtered and concentrated in vacuo, purified by flash chromatography (4% MeOH/CH₂Cl₂) to give the amide as an white solid. MS (ES+): 248 (M+H)⁺; (ES−): 246 (M−H)⁻.

Step B—Preparation of N-(4-chlorophenyl){3-[(4-phenylmethyl)amino](2-pyridyl))carboxamide

To a mixture of the amide from Step A (1.0 eq.) and 4-benzaldehyde (1.0 eq.) in CH₂Cl₂ was added NaBH(OAc)₃ (1.5 eq). The resulted mixture was stirred for 2 days at RT, diluted with CH₂Cl₂, washed with saturated NH₄Cl solution, dried over Na₂SO₄, filtered and concentrated. The crude material was purified through flash chromatography (4% MeOH/CH₂Cl₂) to give the title compound as a white solid. MS (ES⁺): 338 (M+H)⁺; (ES⁻): 336 (M−H)⁻. Calc'd for C₁₉H₁₆ClN₃O-337.81.

The following compounds (Examples 2-4) were analogously synthesized by the method described in Example 1.

EXAMPLE 2

N-(4-Chlorophenyl)(3-{[(4-nitrophenyl)methyl]amino}(2-pyridyl))-carboxamide

MS (ES⁺): 383 (M+H)⁺; (ES⁻): 381 (M−H)⁻. Calc'd for C₁₉H₁₅ClN₄O₃-382.81.

EXAMPLE 3

(2-[[(4-methoxyphenyl)methyl]amino](2-pyridyl))-N-(3-fluoro-4-methylphenyl)carboxamide

MS (ES+): 366 (M+H)⁺. Calc'd for C₂₁H₂₀FN₃O₂-365.41.

EXAMPLE 4

(6-Chloro-2-[[(4-methoxyphenyl)methyl]amino[(3-pyridyl))-N-(3-fluoro-4-methylphenyl)carboxamide Step A—Preparation of 6-chloro-2-[[(4-methoxyphenyl)methyl]amino]pyridine-3-carboxylic acid

A mixture of 2,6-dichloronicotinic acid (1 g, 5.5 mmol) and 4-methoxybenzylamine (1 mL, 7.7 mmol) in a sealed tube was heated at 150° C. for 3 h and 120° C. for 16 h. The resulting solution was cooled to RT and CH₂Cl₂ (10 mL) was added. A precipitate which formed was filtered and washed with CH₂Cl₂ (20 mL). The filtrate was concentrated, dissolved in EtOAc (30 mL), and extracted with NaOH (2 N, 3×15 mL). The combined aqueous solution was acidified with HCl (1 N) to pH 7, and extracted with CH₂Cl₂ (3×20 mL). The combined extracts were dried and concentrated. The compound was purified on SiO₂ column (eluted with a solution of hexane-EtOAc 2:1) to give a yellowish solid.

Step B—Preparation of (6-chloro-2-[[(4-methoxyphenyl)methyl]amino](3-pyridyl))-N-(3-fluoro-4-methylphenyl)carboxamide

A mixture of 6-chloro-2-[[(4-methoxyphenyl)methyl]-amino]pyridine-3-carboxylic acid from Step A (100 mg, 0.34 mmol), EDC (107 mg, 0.56 mmol), HOBt (51 mg, 0.37 mmol) and DIEA (0.1 mL) in CH₂Cl₂ (10 mL) was stirred at RT under N₂ atmosphere for 16 h. It was taken up in CH₂Cl₂ and washed with H₂O then aqueous NaHCO₃. The CH₂Cl₂ was evaporated and the oil was placed on a silica gel GF prep plate and eluted with a solution of hexane-EtOAc (4:1). M+H 400.2, M−H 398.1. Calc'd for C₂₁H₁₉ClFN₃O₂: 399.1.

EXAMPLE 5

(6-Chloro-2-[[(4-methoxyphenyl)methyl]amino[(3-pyridyl))-N-(3-fluoro-4-methylphenyl)carboxamide hydrochloride

(6-Chloro-2-[[(4-methoxyphenyl)methyl]amino[(3-pyridyl))-N-(3-fluoro-4-methylphenyl)carboxamide (Example 4) was dissolved in MeOH (0.5 mL) and added to a solution of HCl-Et₂O. The precipitate was collected and washed with Et₂O to give light yellow solid. MS (ES⁺): 400.2 (M+H); (ES⁻): 398 (M−H). Calc'd for C₂₁H₁₉ClFN₃O₂₋399.851.

EXAMPLE 6

(6-Chloro-2-{[(4-methoxyphenyl)methyl]amino}(3-pyridyl))-N-(4-chlorophenyl)carboxamide

The title compound was analogously synthesized by method described in Example 4. MS (ES⁺): 403 (M+H); (ES⁻): 401 (M−H) . Calc'd for C₂₀H₁₇Cl₂N₃O₂-402.28.

EXAMPLE 7

2-(3-Fluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide Step A: Preparation of 2-chloro-N-(4-phenoxy-phenyl)-nicotinamide

2-Chloropyridine-3-carbonyl chloride (9.15 g, 0.052 mole) was added to a stirred solution of 4-phenoxyaniline (10.00 g, 0.054 mole) and DIEA (10.00 mL, 0.057 mole) in CH₂Cl₂ (100 mL) at RT. The mixture was stirred for 48 h before removal of solvent under reduced pressure. The resulting residue was dissolved in EtOAc and washed several times with saturated NaHCO₃ aqueous solution and brine, respectively. The organic layer was dried over Na₂SO₄ and evaporated to dryness. This material was re-crystallized from EtOAc/Hexane mixtures followed by filtration and rinsing with Et₂O to leave the desired compound as a white solid. MS m/z: 325 (M+1); 323 (M−1).

Step B: 2-(3-Fluoro-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide

2-Chloro-N-(4-phenoxy-phenyl)-nicotinamide (0.025 g, 0.077 mmol) (Step A) and 3-fluorobenzylamine (0.029 g, 2.31 mmol) were combined and heated at 120° C. neat for 18 h. After cooling to RT, the title compound was obtained through purification via preparative HPLC as the TFA salt. MS: (ES+) 414 (M+1)⁺; (ES−) : 412 (M−1)⁻. Calc'd. for C₂₅H₂₀FN₃O₂- 413.15.

The following compounds (Examples 8-37) were prepared by the method similar to that described in Example 7.

EXAMPLE 8

N-(4-Phenoxy-phenyl)-2-(3-trifluoromethyl-benzylamino)-nicotinamide

MS: (ES+) 464 (M+1)⁺; (ES−) : 462 (M−1)⁻. Calc'd. for C₂₆H₂₀F₃N₃O₂-463.15.

EXAMPLE 9

2-(4-Fluorobenzylamino)-N-(4-phenoxy-phenyl)-nicotinamide

MS: (ES+) 414 (M+1)⁺; (ES−): 412 (M−1)⁻. Calc'd. for C₂₅H₂₀FN₃O₂-413.15.

EXAMPLE 10

N-(4-Phenoxy-phenyl)-2-(4-trifluoromethyl-benzylamino)-nicotinamide

MS: (ES+) 464 (M+1)⁺; (ES−): 462 (M−1)⁻. Calc'd. for C₂₆H₂₀F₃N₃O₂-463.15.

EXAMPLE 11

2-(2-Bromo-benzylamino)-N-(4-phenoxy-phenyl)-nicotinamide

MS: (ES+) 475 (M+1)⁺; (ES−): 473 (M−1)⁻. Calc'd. for C₂₅H₂₀BrN₃O₂-473.07.

EXAMPLE 12

N-(4-Phenoxy-phenyl)-2-(4-trifluoromethoxy-benzylamino)-nicotinamide

MS: (ES+) 480 (M+1)⁺; (ES−) : 478 (M−1)⁻. Calc'd. for C₂₆H₂₀F₃N₃O₃-479.15.

EXAMPLE 13

2-(2,3-Difluorobenzylamino)-N-(4-phenoxyphenyl)-nicotinamide

MS: (ES+) 432 (M+1)⁺; (ES−) : 430 (M−1)⁻. Calc'd. for C₂₅H₁₉F₂N₃O₂-431.14.

EXAMPLE 14

N-(4-Chlorophenyl)(2-{[(4-cyanophenyl)methyl]amino}(3-pyridyl))carboxamide

MS (ES+): 363 (M+H); (ES−): 361 (M−H). Calc'd. for C₂₀H₁₅ClN₄O-362.81.

EXAMPLE 15

N-(4-Chlorophenyl)(2-{[(2-cyanophenyl)methyl]amino}(3-pyridyl))carboxamide

MS (ES+): 363 (M+H); (ES−): 361 (M−H). Calc'd. for C₂₀H₁₅ClN₄O-362.81.

EXAMPLE 16

N-(4-sec-butylphenyl)-2-[(4-fluorobenzyl)amino]nicotinamide

MS: (ES+) 378.2 (M+H); (ES−) 376.2 (M−H). Calc'd for C₂₃H₂₄FN₃O-377.45.

EXAMPLE 17

N-(4-tert-Butylphenyl)-2-[(4-fluorobenzyl)amino]nicotinamide

MS: (ES+) 378.2 (M+H); (ES−) 376. (M−H). Calc'd for C₂₃H₂₄FN₃O-377.45.

EXAMPLE 18

N-(4-Isopropyl-phenyl)-2-(3-methoxy-benzylamino)-nicotinamide

MS (ES+): 376 (M+H)⁺; (ES−) : 374 (M−H)⁻. Calc'd C₂₃H₂₅N₃O₂-375.47.

EXAMPLE 19

(2-{[(3-Aminophenyl)methyl]amino}(3-pyridyl))-N-[4-(methylethyl)phenyl]carboxamide

MS (ES+): 361 (M+H)⁺; (ES−): 359 (M−H)⁻. Calc'd C₂₂H₂₄N₄O-360.46.

EXAMPLE 20

(2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[4-(methylethyl)phenyl]carboxamide

MS (ES+): 364(M+H)⁺; (ES−): 362. Calc'd C₂₂H₂₂FN₃O—363.43.

EXAMPLE 21

(2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 390 (M+H); (ES−) 388. (M−H). Calc'd for C₂₀H₁₅F₄N₃O-389.35.

EXAMPLE 22

(2-{[(3,4-Dimethoxyphenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 432 (M+H); (ES−) 430. (M−H). Calc'd for C₂₀H₂₀F₃N₃O₃: 431.41.

EXAMPLE 23

{2-[Benzylamino](3-pyridyl)}-N-[3-(trifluoromethyl)phenyl]-carboxamide

MS: (ES+) 372 (M+H); (ES−) 370. (M−H). Calc'd for C₂₀H₁₆F₃N₃O: 371.36.

EXAMPLE 24

(2-{[(3-Chlorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 406 (M+H); (ES−) 404. (M−H). Calc'd for C₂₀H₁₅ClF₃N₃O: 405.81.

EXAMPLE 25

(2-{[(4-Bromophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 451 (M+H); (ES−)449. (M−H). Calc'd for C₂₀H₁₅BrF₃N₃O: 450.26.

EXAMPLE 26

(2-{[(4-Chlorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 406 (M+H); (ES−) 404. (M−H). Calc'd for C₂₀H₁₅ClF₃N₃O: 405.81.

EXAMPLE 27

(2-{[(2,4-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 408 (M+H); (ES−) 406. (M−H). Calc'd for C₂₀H₁₇F₅N₃O: 407.34.

EXAMPLE 28

2-[1-(4-Fluoro-phenyl)-ethylamino]-N-(3-trifluoromethyl-phenyl)-nicotinamide

MS: (ES+) 404 (M+H); (ES−) 402. (M−H). Calc'd for C₂₁H₁₇F₄N₃O: 403.37.

EXAMPLE 29

(2-{[(3,4-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 408 (M+H); (ES−) 406. (M−H). Calc'd for C₂₀H₁₄F₅N₃O: 407.34.

EXAMPLE 30

(2-{[(2,3-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 408 (M+H); (ES−) 406. (M−H). Calc'd for C₂₀H₁₄F₅N₃O: 407.34.

EXAMPLE 31

(2-{[(2-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 390 (M+H); (ES−) 388. (M−H). Calc'd for C₂₀H₁₅F₄N3O: 389.35.

EXAMPLE 32

(2-{[(2,6-Difluorophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 408 (M+H); (ES−) 406. (M−H). Calc'd for C₂₀H₁₄F₅N₃O: 407.34.

EXAMPLE 33

(2-{[(3-Bromophenyl)methyl]amino}(3-pyridyl))-N-[3-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 451 (M+H); (ES−) 449. (M−H). Calc'd for C₂₀H₁₅BrF₃N₃O: 450.26.

EXAMPLE 34

(2-{[(4-Fluorophenyl)methyl]amino}(3-pyridyl))-N-[4-(trifluoromethyl)phenyl]carboxamide

MS: (ES+) 390 (M+H); (ES−) 388. (M−H). Calc'd for C₂₀H₁₅F₄N₃O: 389.35.

EXAMPLE 35

N-{3-[3-(Dimethylamino)propyl]-5-(trifluoromethyl)phenyl}(2-{[(4-fluorophenyl)methyl]amino}(3-pyridyl))carboxamide Step A: Preparation of {3-[3-amino-5-(trifluoromethyl)phenyl]propynyl}dimethylamine

A mixture of 3-bromo-5-trifluoromethylaniline (1.4 g, 5.9 mmol), 1-dimethylamino-2-propyne (1.3 mL, 0.76 mmol), PdCl₂(PPh₃)₂ (0.26 g, 0.29 mmol) and CuI (114 mg, 0.60 mmol) in 10 mL of TEA was heated at 100° C. in a sealed tube for 3 h. The resulting mixture was filtered over Celite®. The filtrate was concentrated, and the residue was purified by prep-HPLC (reverse phase) to give the aniline. MS (ES+): 243 (M+H)⁺; (ES−): 241 (M−H)⁻. Calc'd C₁₂H₁₃F₃N₂-242.24.

Step B: Preparation of {3-[3-amino-5-(trifluoromethyl)phenyl]propyl}dimethylamine

A mixture of the above aniline (7 g, 29 mmol) and Pd(OH)₂ (0.5 g) in 250 mL of MeOH was stirred under 50 psi H₂. After 2 h, the resulting mixture was filtered over Celite®. The filtrate was concentrated, and the residue was diluted with aq. 1 N HCl. The aq. layer was washed with Et₂O, made basic with aq. 5 N NaOH, and extracted with CH₂Cl₂. The organic solution was dried over NaSO₄ and concentrated to give the titled compound. MS (ES+): 386 (M+H)⁺; (ES−): 384 (M−H)⁻. Calc'd C₁₈H₁₉ClF₃N₃O-385.81.

Step C: Preparation of N-{3-[3-(dimethylamino)propyl]-5-(trifluoromethyl)phenyl}(2-{[(4-fluorophenyl)methyl]amino}(3-pyridyl))carboxamide

The title compound was analogously synthesized by the method described in Example 7. MS (ES+): 475(M+H)⁺; (ES−): 473(M−H)⁻. Calc'd C₂₅H₂₆F₄N₄O-474.50.

EXAMPLE 36

{2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-[4-(tert-butyl)phenyl]carboxamide Step A: Preparation of N-Boc-(3-bromo-4-fluoro-benzyl)amine

To a solution of 3-bromo-4-fluorobenzylamine hydrochloride (10 g, 42 mmol) and TEA (10.5 g, 103 mmol) in 200 mL of CH₂Cl₂ was added BOC₂O (9.1 g, 42 mmol) at RT. The resulting solution was stirred for 16 h. The solution was diluted with aq. 1 N NaOH and CH₂Cl₂. The organic layer was washed with brine, dried over Na₂SO₄, and concentrated to give N-Boc-(3-bromo-4-fluoro-benzyl)amine. MS (ES+): 305 (M+H)⁺; (ES−): 303 (M−H). Calc'd C₁₂H₁₅BrFNO₂-304.16.

Step B: Preparation of [3-(3-dimethylamino-propyl)-4-fluoro-benzyl]-Boc-amine

[3-(3-Dimethylamino-propyl)-4-fluoro-benzyl]-Boc-amine was prepared from N-Boc-(3-bromo-4-fluoro-benzyl)amine according to a procedure similar to that described in Example 35, Step A.

Step C: Preparation of N-{3-[3-(dimethylamino)propyl]-4-fluorophenyl}methylamine

To [3-(3-Dimethylamino-propyl)-4-fluoro-benzyl]-Boc-amine (3.0 g, 10 mmol) in 100 mL of CH₂Cl₂ was slowly added TFA (10 mL). The resulting solution was stirred for 1 h, then concentrated. The residue was diluted with CH₂Cl₂ and aq. NaHCO₃ solution. The organic layer was dried over Na₂SO₄ and concentrated to give the title compound. MS (ES+): 211 (M+H)⁺; (ES−): 209 (M−H). Calc'd C₁₂H₁₉FN₂-210.29.

Step D: Preparation of {2-[({3-[3-(dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-[4-(tert-butyl)phenyl]carboxamide

The title compound was analogously synthesized by the method described in Example 7. MS (ES+): 463 (M+H)⁺; (ES−): 461 (M−H). Calc'd C₂₈H₃₅FN₄O-462.61.

The following compounds were analogously synthesized by the method described in Example 36.

EXAMPLE 37

{2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-[4-(trifluoromethyl)phenyl]carboxamide

MS (ES+): 475 (M+H)⁺; (ES−): 473 (M−H). Calc'd C₂₅H₂₆F₄N₄O-474.50.

EXAMPLE 38

{2-[({3-[3-(Dimethylamino)propyl]-4-fluorophenyl}methyl)amino](3-pyridyl)}-N-(4-bromo-2-fluorophenyl)carboxamide

MS (ES+): 504 (M+H)⁺; (ES−): 502 (M−H). Calc'd C₂₄H₂₅BrF₂N₄O-503.39.

EXAMPLE 39

2-[(4-Fluorobenzyl)amino]-N-[4-tert-butyl-3-(1,2,3,6-tetrahydropyridin-4-yl)phenyl]nicotinamide Step A: Preparation of 2-bromo-1-tert-butyl-4-nitrobenzene

NBS (125.0 g, 697.5 mmol, 1.5 eq) was slowly added to a solution of TFA:H₂SO₄ (5:1, 750 mL) and tert-butyl-4-nitrobenzene (100.0 g, 558.0 mmol) at RT. The solution was stirred for 24 h then poured over 5 kg of ice. The resulting suspension was filtered, washed with a 1:1 MeOH:H₂O solution (200 mL) and dried in a vacuum oven. MS (ES+): 258.1, 260.1 (M+H)⁺.

Step B: Preparation of 4-(2-tert-butyl-5-nitrophenyl)pyridine

To a solution of 2-bromo-1-tert-butyl-4-nitrobenzene (8.6 g, 33.3 mmol) (Step A) and toluene (70 mL) in a 150 mL round bottom flask, 4-pyridylboronic acid (4.5 g, 36.6 mmol, 1.1 eq), Pd(PPh₃)₄ (3.8 g, 3.3 mmol, 0.1 eq) and K₂CO₃ (13.8 g, 99.9 mmol, 3 eq) were added. The solution was stirred for 24 h at 80° C. The solution was filtered through a pad of Celite® and purified by silica flash chromatography (30% Hex/Hex) to afford the desired compound as a yellow solid. MS (ES+): 257.2 (M+H)⁺; (ES−): 255.2 (M−H)⁻.

Step C: Preparation of 4-(2-tert-butyl-5-nitrophenyl)-1-methylpyridinium

4-(2-tert-Butyl-5-nitrophenyl)pyridine (2.0 g, 7.8 mmol) (Step B) was added to a round-bottom flask and dissolved in EtOH (10 mL). CH₃I(30 mL) was added to the flask and heated to reflux. After 6 h, the solution was cooled to RT and concentrated in vacuo resulting in the desired compound as a light brown solid. MS (ES+): 271.2 (M+H)⁺; (ES−): 269.2 (M−H)⁻. Calc'd for C₁₆H₁₉N₂O₂: 271.14.

Step D: Preparation of 4-tert-butyl-3-(1-methyl-1,2,3,6-tetrahydropyridin-4-yl)aniline

4-(2-tert-Butyl-5-nitrophenyl)-1-methylpyridinium (2.1 g, 7.8 mmol) (Step C) was added to a 100 mL round-bottom flask and dissolved in a 10% H₂O/EtOH mixture. Iron dust (1.31 g, 23.4 mmol, 3 eq) and NH₄Cl (460 mg, 8.6 mmol, 1.1 eq) were added. The flask was heated to reflux. After 2 h, the solution was cooled to RT and filtered through a pad of Celite®. The resulting solution was stripped down to a yellow solid and redissolved in MeOH (20 mL, anhydrous). The solution was cooled to 0° C. and slowly adding NaBH₄ (450 mg, 11.7 mmol, 1.5 eq). The solution was cooled to RT and stirred for 30 min. The solvent was stripped-off under vacuum and the solid was redissolved in CH₂Cl₂ and filtered. The solution was concentrated in vacuo to afford an amorphous clear yellow solid. MS (ES+): 245.2 (M+H)⁺.

Step E: Preparation of 2-[(4-fluorobenzyl)amino]-N-[4-tert-butyl-3-(1,2,3,6-tetrahydropyridin-4-yl)phenyl]nicotinamide

The title compound was analogously synthesized by the method described in Example 7. MS: (ES+) 473.2 (M+H); (ES−) 471.4 (M−H). Calc'd for C₂₉H₃₃FN₄O: 472.60.

EXAMPLE 40

[2-({[4-Fluoro-3-(3-morpholin-4-ylprop-1-ynyl)phenyl]methyl}amino)(3-pyridyl)]-N-[3-(trifluoromethyl)phenyl]carboxamide Step A: Preparation of (tert-butoxy)-N-[(3-bromo-4-fluorophenyl)methyl]carboxamide

To a solution of 3-bromo-4-fluorobenzylamine (10 g, 41 mmol) and TEA (14 mL, 104 mmol) in CH₂Cl₂ was added BOC₂O (9.1 g, 41 mmol). The resulting solution was stirred for 16 h at RT, then diluted with aq. 1 N NaOH and CH₂Cl₂. The organic layer was separated, washed with brine, dried over Na₂SO₄, and concentrated to give (tert-butoxy)-N-[(3-bromo-4-fluorophenyl)methyl]carboxamide.

Step B: Preparation of (tert-Butoxy)-N-{[4-fluoro-3-(3-hydroxyprop-1-ynyl)phenyl]methyl}carboxamide

A mixture of tert-butoxy-N-[(3-bromo-4-fluorophenyl)methyl]carboxamide (0.6 g, 2.0 mmol, Step A), CuI (38 mg, 0.2 mmol), PdCl₂(PPh₃)₂ (72 mg, 0.1 mmol), propargyl alcohol (0.35 mL, 6.0 mmol) and TEA (12 mL) was heated at 100° C. for 5 h. The resulting mixture was filtered, and the filtrate was concentrated. The residue was purified by SiO₂ chromatography to give the title compound. MS (ES+): 297 (M+NH4)⁺. Calc'd C₁₅H₂₂FN₂O₃-297.34.

Step C: Preparation of [4-Fluoro-3-(3-morpholin-4-ylprop-1-ynyl)phenyl]-methylamine

To a mixture of (tert-butoxy)-N-{[4-fluoro-3-(3-hydroxyprop-1-ynyl)phenyl]methyl}carboxamide (0.23 g, 0.82 mmol) (Step B) and NMO (0.14 g, 1.3 mmol) was added catalytic amount of TPAP. The resulting mixture was stirred for 1 h at RT, then filtered over a short pad of SiO₂ and concentrated. To a solution of the residue and morpholine (0.1 mL, 1.2 mmol) in CH₂Cl₂ was added excess NaBH(OAc)₃. The resulting solution was stirred for 16 h, diluted with CH₂Cl₂ and saturated aq. NaHCO₃ solution. The organic layer was separated, dried over Na₂SO₄, and concentrated. The residue was purified by SiO₂ chromatography to give a colorless oil, which was dissolved in 5 mL of CH₂Cl₂. To the organic solution was added TFA (2 mL). The resulting solution was stirred for 1 h at RT, then concentrated. The residue was diluted with CH₂Cl₂ and saturated aq. NaHCO₃ solution. The organic layer was separated, dried over Na₂SO₄, and concentrated to give the title compound. MS (ES+): 249 (M+H)⁺; (ES−): 247. Calc'd C₁₄H₁₇FN₂O-248.30.

Step D: Preparation of [2-({[4-fluoro-3-(3-morpholin-4-ylprop-1-ynyl)phenyl]methyl}amino)(3-pyridyl)]-N-[3-(trifluoromethyl)phenyl]carboxamide

The title compound was analogously synthesized by the method described in Example 7. MS (ES+): 513 (M+H)⁺; (ES−): 511. Calc'd C₂₇H₂₄F₄N₄O₂-512.51.

EXAMPLE 41

{2-[(2H-Benzo[d]1,3-dioxol-5-ylmethyl) amino](3-pyridyl)}-N-(4-phenoxyphenyl)carboxamide

2-Chloro-(3-pyridyl)-N-(4-phenoxyphenyl)-carboxamide (0.500 g, 1.5 mmol) and 2H-benzo[d]1,3-dioxolan-5-ylmethylamine (0.680 g, 4.5 mmol) were combined and heated neat at 110° C. for 18 h. After cooling to RT, the resulting residue was dissolved in EtOAc and washed with saturated NaACO₃ solution and brine, respectively. The organics were dried over Na₂SO₄ and evaporated. The crude material was purified by column chromatography with EtOAc/hexanes (1:2) as eluant to leave the desired compound as an off-white solid. MS: (ES+) 440 (M+1)⁺; (ES−): 438 (M−1)⁻. Calc'd. for C₂₆H₂₁N₃O₄-439.15.

EXAMPLE 42

2-(4-Fluoro-benzylamino)-N-[3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenyl]-nicotinamide

2-Chloro-N-[3-(2-pyrrolidin-1-yl-ethoxy)-4-trifluoromethyl-phenyl]-nicotinamide (199.1 mg), DIEA (252 μL) and 4-fluorobenzylamine (193 μL) were combined in a sealed tube and heated to 130° C. for 2 h. The mixture was purified on silica gel chromatography (2-3.5% MeOH/CH₂Cl₂). The desired fractions were concentrated in vacuo, and the residue was dissolved in Et₂O and hexanes were added until the solution became cloudy. The solids were filtered, and dried. Additional material was obtained from the filtrate upon additional rounds of concentration, dissolving in Et₂O and treatment with hexanes. M+H 503.4, Calc'd for C₂₆H₂₆N₄O₂F₄-502.2.

EXAMPLE 43

(R) 2-(4-Fluoro-benzylamino)-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide

2-Chloro-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide (442.8 mg) DIEA (351 μL) and 4-fluorobenzylamine (322 μL) were combined in a sealed tube and heated to 130° C. for 3 h. The mixture was diluted with EtOAc and H₂O, the layers were separated and the organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified with silica gel chromatography (1% MeOH/CH₂Cl₂) to obtain an off-white solid.

EXAMPLE 44

N-[4-tert-Butyl-3-(1-Boc-piperidin-4-ylmethoxy)-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide

N-[4-tert-Butyl-3-(1-Boc-piperidin-4-ylmethoxy)-phenyl]-2-chloro-nicotinamide (200 mg), DIEA (145 μL), IpOH (3 mL) and 4-fluorobenzylamine (184 μL) were combined in a sealed tube and heated to 125° C. for 2 days. The mixture was purified by flash chromatography (EtOAc) to provide the product. M+Na 619; Calc'd for C₃₄H₄₃FN₄O₄: 590.33.

EXAMPLE 45

N-[3,3-Dimethyl-1-(1-methyl-piperidin-4-yl)-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide

A solution of N-[3,3-dimethyl-1-(1-methyl-piperidin-4-yl)-2,3-dihydro-1H-indol-6-yl]-2-fluoro-nicotinamide (500 mg), 4-fluorobenzylamine (240 μL) and NaHCO₃ (359 mg) was dissolved in IpOH (5 mL) and heated to 85° C. overnight. After cooling to RT, the mixture was dried under N₂. The residue was partitioned between EtOAc and H₂O, the organic layer was separated, washed with brine, dried over Na₂SO₄ and filtered. Silica was added to the filtrate and concentrated to a residue. It was purified by flash chromatography (10% MeOH/EtOAc) to yield a fluffy yellow solid. M+H 488.4. Calc'd for C₂₉H₃₄FN₅O: 487.3.

The following compounds (Examples 46-53) were analogously formed from the corresponding fluoro compounds by the method described in Example 45.

46) N-[1-(2-Dimethylamino-acetyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide. M+H 476.3; Calc'd 475.24.

47) N-[1-(1-Boc-piperidin-4-yl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide. M+H 574.5; Calc'd 573.31.

48) N-[3,3-Dimethyl-1-(2-Boc-amino-acetyl)-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide. M+H 548.4.

49) 2-(4-Fluoro-benzylamino)-N-(2-Boc-4,4-dimethyl-1,2,3,4-tetrahydro-isoquinolin-7-yl)-nicotinamide. M+H 505.4.

50) N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide was prepared as above but at 90 C overnight and with a second addition of amine prior to heating for another 24 h. M+Na 611. Calc'd 588.2.

51) N-[4-tert-Butyl-3-(1-Boc-pyrrolidin-2-ylmethoxy)-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide. M+Na 599. Calc'd 576.31.

52) N-(4-Acetyl-2,2-dimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-2-(4-fluoro-benzylamino)-nicotinamide was prepared as described above but substituting t-BuOH for IpOH and heating overnight at 80 C. M+H 449.1; Calc'd 448.19.

53) 2-(4-Fluoro-benzylamino)-N-[3-(1-Boc-piperidin-4-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide. M+H 603.4.

EXAMPLE 54

(R) 2-(4-Fluoro-benzylamino)-N-[3-(pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide

2-(4-Fluoro-benzylamino)-N-[3-(1-Boc-pyrrolidin-2-ylmethoxy)-4-pentafluoroethyl-phenyl]-nicotinamide (Example 43) was dissolved in CH₂Cl₂ (8 mL) and TFA (8 mL) was added. After stirring at RT for 70 min, the mixture was concentrated in vacuo, diluted with 2N NaOH and CH₂Cl₂. The layers were separated and the aqueous layer was back extracted with CH₂Cl₂. The organic layer was washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo to provide an light pink-orange solid. M+H 539.5. Calc'd for C₂₆H₂₄F₆N₄O₂: 538.2.

The following compounds (Examples 55-59) were analogously formed from the corresponding Boc-protected compounds by the method described in Example 54.

55) (R) 2-(4-Fluoro-benzylamino)-N-[3-(pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide. M+H 489; Calc'd 488.2.

56) N-[4-tert-Butyl-3-(piperidin-4-ylmethoxy)-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide. M+H 491; Calc'd 490.3.

57) (R) N-[4-tert-Butyl-3-(pyrrolidin-2-ylmethoxy)-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide. M+H 477; Calc'd 476.3.

58) N-(4,4-Dimethyl-1,2,3,4-tetrahydro-isoquinolin-7-yl)-2-(4-fluoro-benzylamino)-nicotinamide. M+H 405.1; Calc'd 404.2.

59) N-[1-(2-Amino-acetyl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide.

EXAMPLE 60

N-(3,3-Dimethyl-1-piperidin-4-yl-2,3-dihydro-1H-indol-6-yl)-2-(4-fluoro-benzylamino)-nicotinamide

N-[1-(1-Boc-piperidin-4-yl)-3,3-dimethyl-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide (Example 47) was dissolved in a mixture of conc. HCl and EtOAc and stirred at RT for 1.5 h. The mixture was concentrated in vacuo and the residue was partitioned between EtOAc and 1 N NaOH. The organic layer was removed, washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo to provide a yellow solid. M+H 474.3. Calc'd for C₂₈H₃₂FN₅O: 473.3.

EXAMPLE 61

2-(4-Fluoro-benzylamino)-N-[3-(piperidin-4-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide

2-(4-Fluoro-benzylamino)-N-[3-(piperidin-4-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide was prepared by a method similar to that described for Example 60. M+H 503.3. Calc'd for C₂₆H₂₆F₄N₄O₂: 502.2.

EXAMPLE 62

N-(2,2-Dimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-2-(4-fluoro-benzylamino)-nicotinamide

N-(4-Acetyl-2,2-dimethyl-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-2-(4-fluoro-benzylamino)-nicotinamide (250 mg, Example 52) was dissolved in EtOH (10 mL) and treated with conc. HCL (0.5 mL) at 60° C. for 16 h. The mixture was cooled to 0° C. and sat. NaHCO₃ (aq) was added. The mixture was extracted with EtOAc (3×50 mL) and the combined organic fractions were washed with brine, dried over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (50% EtOAc/hexanes). M+H 407.3; Calc'd for C₂₃H₂₃FN₄O₂: 406.18.

EXAMPLE 63

(S)-2-(4-Fluoro-benzylamino)-N-[3-(1-methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide

2-Fluoro-N-[3-(1-methyl-pyrrolidin-2-ylmethoxy)-5-trifluoromethyl-phenyl]-nicotinamide (300 mg), TEA (314 μL) and 4-fluorobenzylamine (170 μL) were combined in a sealed tube and heated to 90° C. for 3 h. Cooled to RT and the mixture was diluted with EtOAc, washed with sat. NH₄Cl (2×), brine, dried over Na₂SO₄, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (CH₂Cl₂/MeOH/NH₄OH 95/5/0.5) to provide an off-white foam upon drying. M+H 503. Calc'd for C₂₆H₂₆F₄N₄O₂: 502.20.

EXAMPLE 64

N-[3,3-Dimethyl-1-(1-methyl-piperidin-4-ylmethyl)-2,3-dihydro-1H-indol-6-yl]-2-(4-fluoro-benzylamino)-nicotinamide

To N-(3,3-dimethyl-1-piperidin-4-ylmethyl-2,3-dihydro-1H-indol-6-yl)-2-(4-fluoro-benzylamino)-nicotinamide (0.92 g) dissolved in DCE (20 mL) at RT was added formaldehyde (37% aqueous, 0.42 mL) followed by NaBH(OAc)₃ (1.59 g). After 4 h, the mixture was quenched with 1 N HCl (20 mL) and H₂O (20 mL). It was basified with sat NaHCO₃, extracted with CH₂Cl₂ (3×50 mL) and the combined extracts were washed with brine, dried (K₂CO₃) and concentrated onto SiO₂ (previously treated with 10% MeOH (2 M NH₃ in MeOH/CH₂Cl₂ and then concentrated in vacuo). The residue was purified by flash chromatography (Isco, 35 g column, 1-7% MeOH (2M NH₃ in MeOH/CH₂Cl₂). The bulk of the crude yellow material was further purified by reverse phase Prep HPLC. The isolated fractions were partially concentrated and basified with 1 N NaOH and dried under vacuum to afford a slightly yellow powder. M+H=502.3. Calc'd for C₃₀H₃₆FN₅O: 501.29.

EXAMPLE 65

2-(4-Fluoro-benzylamino)-N-{4-[1-methyl-1-(1-methyl-piperidin-4-yl)-ethyl]-phenyl}-nicotinamide

A solution of 2-fluoro-N-{4-[1-methyl-1-(1-methyl-piperidin-4-yl)-ethyl]-phenyl}-nicotinamide (355 mg) and 4-fluorobenzylamine (250 mg) in pyridine (10 mL) was suspended with NaHCO₃ (1 g). The mixture was heated to 105° C. overnight. Solids were removed by filtration and the filtrate was concentrated in vacuo. The residue was purified on prep. TLC plates (silica, EtOAc:TEA=10:1) to provide the desired product. MS (ES+): 461 (M+1)+, Calc'd for C₂₈H₃₃FN₄O-460.59.

EXAMPLE 66

N-(4,4-Dimethyl-2-oxo-1,2,3,4-tetrahydro-quinolin-7-yl)-2-(4-fluoro-benzylamino)-nicotinamide

M+H 419.1. Calc'd for C₂₄H₂₃FN₄O₂: 418.2.8.

EXAMPLE 67

3-Benzo[1,3]dioxol-5-yl-3-[3-(4-pentafluoroethyl-phenylcarbamoyl)-pyridin-2-ylamino]-propionic acid

The Compound was synthesized by a procedure similar to the method described in Example 45. M+H 524.1. Calc'd for C₂₅H₂₀F₅N₃O₅: 537.13.

EXAMPLE 68

N-(3,3-Dimethyl-1-(methylsulfonyl)-2,3-dihydro-1H-indol-6-yl)-2-(((4-fluorophenyl)methyl)amino)-3-pyridinecarboxamide

Calc'd for C₂₄H₂₅FN₄O₃S—468.55; M+H—469.1.

EXAMPLE 69

N-(4-(1,1-Dimethylethyl)-3-((N,N-dimethylglycyl)amino)phenyl)-2-(((4-fluorophenyl)methyl)amino)-3-pyridinecarboxamide

Calc'd for C₂₇H₃₂FN₅O₂-477.581; M+H 478.

EXAMPLE 70

2-(((4-Fluorophenyl)methyl)amino)-N-(3-((((2R)-1-methyl-2-pyrrolidinyl)methyl)oxy)-5-(trifluoromethyl)phenyl)-3-pyridinecarboxamide

C₂₆H₂₆F₄N₄O₂-502.509; M+H 503.

EXAMPLE 71

2-(((4-Fluorophenyl)methyl)amino)-N-(3-((methylsulfonyl)amino)-5-(trifluoromethyl)phenyl)-3-pyridinecarboxamide

C₂₁H₁₈F₄N₄O₃S-482.456; M+H 483, M+Na 505.

EXAMPLE 72

2-(((4-Fluorophenyl)methyl)amino)-N-(4-(1-methyl-1-(5-methyl-1,3,4-oxadiazol-2-yl)ethyl)phenyl)-3-pyridinecarboxamide

MS: 446 (M+1); Calc'd for C₂₅H₂₅FN₅O₂-445.19.

EXAMPLE 73

3-(2-Chloro-5-{[2-(4-fluoro-benzylamino)-pyridine-3-carbonyl]-amino}-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester

MS (ES⁺): 542 (M+H)⁺. Calc'd for C₂₈H₃₀ClFN₄O₄-541.02.

EXAMPLE 74

N-[3-(Azetidin-3-ylmethoxy)-4-chloro-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide

To a solution of 10 mL of TFA/CH₂Cl₂ (1:1) was added 3-(2-chloro-5-{[2-(4-fluoro-benzylamino)-pyridine-3-carbonyl]-amino}-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester (270 mg, 0.5 mmol) at 0° C. The solution was stirred for 2 h at RT. The solvents were removed in vacuo. The residue was diluted in 30 mL of EtOAc and washed with 30 mL of saturated aqueous NaHCO₃, then brine. The resulting organic phase was dried over MgSO₄ and concentrated in vacuo. The title compound was purified by column chromatography (silica gel, 5% 2N NH₃ in MeOH/EtOAc) and isolated as a white solid. MS (ES⁺): 442 (M+H)⁺. Calc'd for C₂₃H₂₂ClFN₄O₂-440.90.

EXAMPLE 75

6-Chloro-3-(4-fluoro-benzylamino)-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide

A mixture of 3-(benzotriazol-1-yloxy)-6-chloro-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide (0.348 g, 0.82 mmol) and 4-fluorobenzylamine (1.0 mL, 8.75 mmol) was stirred at 60° C. under N₂ for 30 min, cooled to RT, and purified by flash column chromatography. The desired compound was obtained as a solid. MS (ES⁺): 413.0 (M+H)⁺. Calc'd for C₂₂H₂₂ClFN₄O-412.89.

EXAMPLE 76

3-(4-Fluoro-benzylamino)-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide

A mixture of 6-chloro-3-(4-fluoro-benzylamino)-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide (0.210 g, 0.51 mmol) and Pd/C (50 mg, 10% weight) in 10 mL of MeOH was placed under H₂ from a balloon and stirred at RT for 26 h, filtered through Celite®, condensed, and purified by flash column chromatography (0.5% to 2% of MeOH in CH₂Cl₂, then 1% of MeOH and 1% of NH₄OH in CH₂Cl₂ ). The titled product was obtained as a light yellowish solid. MS (ES⁺): 379.0(M+H)⁺. Calc'd for C₂₂H₂₃FN₄O-378.44.

EXAMPLE 77

3-(4-Fluoro-benzylamino)-1,2,5,6-tetrahydro-pyridazine-4-carboxylic acid (4-tert-butyl-phenyl)-amide

The titled compound was prepared in the same method as that of Example 76, and isolated as a light yellowish solid. MS (ES⁺): 383.0 (M+H)⁺. Calc'd for C₂₁H₂₃N₅O-382.47.

EXAMPLE 78

N-[3-(Azetidin-3-ylmethoxy)-5-trifluoromethyl-phenyl]-2-(4-fluoro-benzylamino)-nicotinamide

The title compound was synthesized from 3-(3-amino-5-trifluoromethyl-phenoxymethyl)-azetidine-1-carboxylic acid benzyl ester analogous to that described for Example 74. MS (ES+): 475.1 (M+H)⁺. Calc'd. for C₂₈H₃₄N₄O-474.5.

EXAMPLE 79

2-(4-Hydroxy-3-nitro-benzylamino)-N-(4-isopropyl-phenyl)-nicotinamide

MS: (ES+) 407 (M+H) . Calc'd for C₂₂H₂₂N₄O₄-406.45.

EXAMPLE 80

2-(4-Hydroxy-3-amino-benzylamino)-N-(4-isopropyl-phenyl)-nicotinamide

MS: (ES+) 377 (M+H) . Calc'd for C₂₂H₂₄N₄O₂-376.45.

Other compounds included in this invention are set forth in Tables 1-3 below. TABLE 1

# R¹ R² R⁸ 81. 4-chlorophenyl H 4-amino- 82. 3-isoquinolinyl H 83. 2-quinolinyl H 84. 2-benzthiazolyl H 85. 2-benzimidazolyl H 4-amino- 86. 4-benzimidazolyl H 87. 5-benzimidazolyl H 88. 6-benzimidazolyl H 89. 7-benzimidazolyl H 90. 2-chlorophenyl 5-Br 91. 3-isoquinolinyl 5-Br 92. 2-quinolinyl 5-Br 93. 2-benzthiazolyl 5-Br 94. 2-benzimidazolyl 5-Br 95. 4-benzimidazolyl 5-Br 96. 5-benzimidazolyl 5-Br 97. 6-benzimidazolyl 5-Br 4-amino- 98. 7-benzimidazolyl 5-Br 4-amino- 99. 4-chlorophenyl 5-Br 3-amino 100. 4-chlorophenyl 5-Br 4-hydroxy 101. 4-chlorophenyl 6-CH₃ 4-amino- 102. 4-phenoxyphenyl H 4-amino 103. 3-phenoxyphenyl H 4-methoxy 104. 4-biphenyl H 4-methoxy 105. 4-cyclohexylphenyl H 4-methoxy 106. 2-quinolyl H 4-methoxy 107. 3-isoquinolyl H 4-methoxy 108. 3-quinolyl H 4-methoxy 109. 1-isoquinolyl H 4-methoxy 110. 5-quinolyl H 4-methoxy 111. 5-isoquinolyl H 4-methoxy 112. 6-quinolyl H 4-methoxy 113. 6-isoquinolyl H 4-methoxy 114. 7-quinolyl H 4-methoxy 115. 7-isoquinolyl H 4-hydroxy 116. 4-quinolyl H 4-hydroxy 117. 4-isoquinolyl H 4-hydroxy 118. 4-pyridyl H 4-hydroxy 119. 4-pyrimidinyl H 4-hydroxy 120. 2-pyrimidinyl H 4-hydroxy 121. 6-pyrimidinyl H 4-hydroxy 122. 4-pyridazinyl H 4-hydroxy 123. 5-pyridazinyl H 4-hydroxy 124. 4-indolyl H 4-hydroxy 125. 5-isoindolyl H 3-amino 126. 5-naphthyridinyl H 3-amino 127. 6-quinozalinyl H 3-amino 128. 6-isoquinolyl H 3-amino 129. 4-naphthyridinyl H 3-amino 130. 5-quinozalinyl H 3-amino 131. 4-naphthyridinyl H 3-amino 132. 3,4-dichlorophenyl H 2-cyano 133. 6-isoquinolyl H 2-cyano 134. 4-chlorophenyl H 3-cyano 135. 4-chlorophenyl H 4-cyano 136. 6-indazolyl H 3-hydroxymethyl 137. 6-isoindolyl H 3-hydroxymethyl 138. 5-indazolyl H 3-hydroxymethyl 139. 5-isoindolyl H 3-hydroxymethyl 140. 6-benzothienyl H 3-hydroxymethyl 141. 6-benzofuryl H 3-hydroxymethyl 142. 5-benzothienyl H 3-hydroxymethyl 143. 5-benzofuryl H 3-hydroxymethyl 144. 2-benzimidazolyl H 3-hydroxymethyl 145. 2-benzoxazolyl H 3-hydroxymethyl 146. 6-benzimidazolyl H 3-hydroxymethyl 147. 6-benzoxazolyl H 3-hydroxymethyl 148. 6-benzthiazolyl H 4-amino 149. 2-quinazolinyl H 4-hydroxymethyl 150. 3-(phenoxy)-6-pyridyl H 3-aminocarbonyl 151. 4-(phenylcarbonyl)phenyl H 3-aminocarbonyl 152. 4-(phenylamino)phenyl H 3-aminocarbonyl 153. 4-cyclohexyloxyphenyl H 3-aminocarbonyl 154. 4-(3-thienyl)phenyl H 4-amino 155. 4-(pyrazol-3-yl)phenyl H 4-amino 156. 4-pyridyl 6-Cl 4-amino, 3-F 157. 3-methoxyphenyl 6-Cl 4-amino, 3-F 158. 4-hydroxyphenyl 6-Cl 4-amino, 3-F 159. 3-hydroxyphenyl H 4-methoxy, 3-F 160. 2 -hydroxyphenyl H 3-methoxy, 3-F 161. 4-chlorophenyl 6-phenyl 4-amino 162. 4-phenoxyphenyl 6-phenyl 4-amino 163. 4-biphenyl 6-phenyl 4-amino 164. 4-hydroxyphenyl 6-phenyl 4-amino 165. 4-cyclohexylphenyl 6-phenyl 4-amino 166. 3-isoquinolyl 6-phenyl 4-amino

TABLE 2

# R⁸ R² R¹ 154. 4-amino- 4-chlorophenyl H 155. 4-amino- 3-isoquinolinyl H 156. 4-amino- 2-quinolinyl H 157. 4-amino- 2-benzthiazolyl H 158. 4-amino- 2-benzimidazolyl H 159. 4-amino- 4-benzimidazolyl H 160. 4-amino- 5-benzimidazolyl H 161. 4-amino- 6-benzimidazolyl H 162. 4-amino- 7-benzimidazolyl H 163. 4-amino- 2-chlorophenyl 5-Br 164. 4-amino- 3-isoquinolinyl 5-Br 165. 4-amino- 2-quinolinyl 5-Br 166. 4-amino- 2-benzthiazolyl 5-Br 167. 4-amino- 2-benzimidazolyl 5-Br 168. 4-amino- 4-benzimidazolyl 5-Br 169. 4-amino- 5-benzimidazolyl 5-Br 170. 4-amino- 6-benzimidazolyl 5-Br 171. 4-amino- 7-benzimidazolyl 5-Br 172. 3-amino- 4-chlorophenyl 5-Br 173. 4-hydroxy- 4-chlorophenyl 5-Br 174. 4-amino- 4-chlorophenyl 6-CH₃ 175. 4-phenoxyphenyl H 4-amino 176. 3-phenoxyphenyl H 4-methoxy 177. biphenyl H 4-methoxy 178. 4-cyclohexylphenyl H 4-methoxy 179. 2-quinolyl H 4-methoxy 180. 3-isoquinolyl H 4-methoxy 181. 3-quinolyl H 4-methoxy 182. 1-isoquinolyl H 4-methoxy 183. 5-quinolyl H 4-methoxy 184. 5-isoquinolyl H 4-methoxy 185. 6-quinolyl H 4-methoxy 186. 6-isoquinolyl H 4-methoxy 187. 7-quinolyl H 4-methoxy 188. 7-isoquinolyl H 4-hydroxy 189. 4-quinolyl H 4-hydroxy 190. 4-isoquinolyl H 4-hydroxy 191. 4-pyridyl H 4-hydroxy 192. 4-pyrimidinyl H 4-hydroxy 193. 2-pyrimidinyl H 4-hydroxy 194. 6-pyrimidinyl H 4-hydroxy 195. 4-pyridazinyl H 4-hydroxy 196. 5-pyridazinyl H 4-hydroxy 197. 4-indolyl H 4-hydroxy 198. 5-isoindolyl H 3-amino 199. 5-naphthyridinyl H 3-amino 200. 6-quinozalinyl H 3-amino 201. 6-isoquinolyl H 3-amino 202. 4-naphthyridinyl H 3-amino 203. 5-quinozalinyl H 3-amino 204. 4-naphthyridinyl H 3-amino 205. 6-indazolyl H 3-hydroxymethyl 206. 6-isoindolyl H 3-hydroxymethyl 207. 5-indazolyl H 3-hydroxymethyl 208. 5-isoindolyl H 3-hydroxymethyl 209. 6-benzothienyl H 3-hydroxymethyl 210. 6-benzofuryl H 3-hydroxymethyl 211. 5-benzothienyl H 3-hydroxymethyl 212. 5-benzofuryl H 3-hydroxymethyl 213. 2-benzimidazolyl H 3-hydroxymethyl 214. 2-benzoxazolyl H 3-hydroxymethyl 215. 2-benzthiazolyl H 3-hydroxymethyl 216. 6-benzimidazolyl H 3-hydroxymethyl 217. 6-benzoxazolyl H 3-hydroxymethyl 218. 6-benzthiazolyl H 4-amino 219. 2-quinazolinyl H 4-hydroxymethyl

TABLE 3

# R⁸ Y R² R¹ 220. 4-F —NHSO₂— 4-chlorophenyl H 221. 4-F —NHSO₂— 4-chlorophenyl 5-Br 222. 3,4-diF —NHSO₂— 3-chlorophenyl H 223. 4-Cl —NHSO₂— 3-chlorophenyl 5-Br 224. H —NHSO₂— 4-phenoxyphenyl H 225. 4-F —NHSO₂— 4-biphenyl H 226. 4-F —NHSO₂— 3-isoquinolyl H 227. 3,4-diF —NHSO₂— 3-isoquinolyl 5-Br 228. H —NHSO₂— 4-chlorophenyl H 229. 4-F —NHSO₂— 4-chlorophenyl 5-Br 230. 4-F —NHSO₂— 3-chlorophenyl H 231. 3,4-diF —NHSO₂— 3-chlorophenyl 5-Br 232. H —NHSO₂— 4-phenoxyphenyl H 233. 4-F —NHSO₂— 4-biphenyl H 234. 4-F —NHSO₂— 3-isoquinolyl H 235. 3,4-diF —NHSO₂— 3-isoquinolyl 5-Br 236. H —NHCH₂—

H 237. 4-F —NHCH₂—

H 238. 4-F —NHCH₂—

H 239. 4-F —NHCH₂—

H 240. 4-F —NHCH₂— 3-CF₃-phenyl F 241. 4-F —NHCH₂—

H 242. 4-F —NHCH₂—

H 243. 3,4-diF —NHCH₂—

H 244. H —NHCH₂—

H 245. 4-F —NHCH₂—

H 246. 4-F —NHCH₂—

H 247. 4-F —NHCH₂—

H 248. 3,4-diF —NHCH₂—

H 249. H —NHCH₂—

H 250. 4-F —NHCH₂—

H 251. 4-F —NHCH₂—

H 252. 3,4-diF —NHCH₂—

H 253. H —NHCH₂—

H 254. 4-F —NHCH₂—

H 255. 4-F —NHCH₂—

H 256. 4-F —NHCH₂—

H 257. 3,4-diF —NHCH₂—

H 258. H —NHCH₂—

H 259. 4-F —NHCH₂—

H 260. 4-F —NHCH₂—

H 261. 3,4-diF —NH(CH₂)₂—

H 262. H —NH(CH₂)₂—

H 263. 4-F —NH(CH₂)₂—

H 264. 4-F —NH(CH₂)₂—

H 265. 3,4-diF —NHCH₂—

H 266. H —NHCH₂—

H 267. 4-F —NHCH₂—

H 268. 4-F —NHCH₂—

H 269. 4-F —NHCH₂—

H 270. 4-F —NHCH₂—

H 271. 4-F —NHCH₂—

H 272. 4-F —NHCH₂—

H

Although the pharmacological properties of the compounds of Formulas I-IV vary with structural change, in general, activity possessed by compounds of Formulas I-IV may be demonstrated in vivo. The pharmacological properties of the compounds of this invention may be confirmed by a number of pharmacological in vitro assays. The exemplified pharmacological assays which follow have been carried out with the compounds according to the invention and their salts. Compounds of the present invention showed inhibition of KDR kinase at doses less than 50 μm.

Biological Evaluation HUVEC Proliferation Assay

Human Umbilical Vein Endothelial cells are purchased from Clonetics, Inc., as cryopreserved cells harvested from a pool of donors. These cells, at passage 1, are thawed and expanded in EBM-2 complete medium, until passage 2 or 3. The cells are trypsinized, washed in DMEM+10% FBS+antibiotics, and spun at 1000 rpm for 10 min. Prior to centrifugation of the cells, a small amount is collected for a cell count. After centrifugation, the medium is discarded, and the cells are resuspended in the appropriate volume of DMEM+10% FBS+antibiotics to achieve a concentration of 3×10⁵ cells/mL. Another cell count is performed to confirm the cell concentration. The cells are diluted to 3×10⁴ cells/mL in DMEM+10% FBS+antibiotics, and 100 μL of cells are added to a 96-well plate. The cells are incubated at 37° C. for 22 h.

Prior to the completion of the incubation period, compound dilutions are prepared. Five-point, five-fold serial dilutions are prepared in DMSO, at concentrations 400-fold greater than the final concentrations desired. 2.5 μL of each compound dilution are diluted further in a total of 1 mL DMEM+10% FBS+antibiotics (400× dilution). Medium containing 0.25% DMSO is also prepared for the 0 μM compound sample. At the 22-hour timepoint, the medium is removed from the cells, and 100 μL of each compound dilution is added. The cells are incubated at 37° C. for 2-3 h.

During the compound pre-incubation period, the growth factors are diluted to the appropriate concentrations. Solutions of DMEM+10% FBS+antibiotics, containing either VEGF or bFGF at the following concentrations: 50, 10, 2, 0.4, 0.08, and 0 ng/mL are prepared. For the compound-treated cells, solutions of VEGF at 550 ng/mL or bFGF at 220 ng/mL for 50 ng/mL or 20 ng/mL final concentrations, respectively, are prepared since 10 μL of each will be added to the cells (110 μL final volume). At the appropriate time after adding the compounds, the growth factors are added. VEGF is added to one set of plates, while bFGF is added to another set of plates. For the growth factor control curves, the media on wells B4-G6 of plates 1 and 2 are replaced with media containing VEGF or bFGF at the varying concentrations (50-0 ng/mL). The cells are incubated at 37° C. for an additional 72 h.

At the completion of the 72 h incubation period, the medium is removed, and the cells are washed twice with PBS. After the second wash with PBS, the plates are tapped gently to remove excess PBS, and the cells are placed at −70° C. for at least 30 min. The cells are thawed and analyzed using the CyQuant fluorescent dye (Molecular Probes C-7026), following the manufacturer's recommendations. The plates are read on a Victor/Wallac 1420 workstation at 485 nm/530 nm (excitation/emission). Raw data are collected and analyzed using a 4-parameter fit equation in XLFit. IC₅₀ values are then determined.

The compounds of examples 16-17 20-21, 25-27, 29, 34-35, 39-42, 45-46, 52, 54-57, 58-65, 212, 215 and 243-245 inhibited VEGF-stimulated HUVEC proliferation at a level below 50 nM.

Angiogenesis Model

To determine the effects of the present compounds on angiogenesis in vivo, selective compounds are tested in the rat corneal neovascularization micropocket model or the angiogenesis assay of Passaniti, Lab. Invest., 67:519-528 (1992).

Rat Corneal Neovascularization Micropocket Model

In Life Aspects: Female Sprague Dawley rats weighing approximately 250 g were randomized into one of five treatment groups. Pretreatment with the vehicle or compound was administered orally, 24 h prior to surgery and continued once a day for seven additional days. On the day of surgery, the rats were temporarily anesthetized in an Isofluorane gas chamber (delivering 2.5 L/min oxygen+5% Isofluorane). An othoscope was then placed inside the mouth of the animal to visualize the vocal cords. A tip-blunted wire was advanced in between the vocal cords and used as a guide for the placement of an endotracheal Teflon tube (Small Parts Inc. TFE-standard Wall R-SWTT-18). A volume-controlled ventilator (Harvard Apparatus, Inc. Model 683) was connected to the endotracheal tube to deliver a mixture of oxygen and 3% Isofluorane. Upon achieving deep anesthesia, the whiskers were cut short and the eye areas and eyes gently washed with Betadine soap and rinsed with sterile saline. The corneas were irrigated with one to two drops of Proparacaine HCl ophthalmic topical anesthetic solution (0.5%) (Bausch and Lomb Pharmaceuticals, Tampa Fla.). The rat was then positioned under the dissecting microscope and the corneal surface brought into focus. A vertical incision was made on the midline of the cornea using a diamond blade knife. A pocket was created by using fine scissors to separate the connective tissue layers of the stroma, tunneling towards the limbus of the eye. The distance between the apex of the pocket and the limbus was approximately 1.5 mm. After the pocket had been made, the soaked nitrocellulose disk filter (Gelman Sciences, Ann Arbor Mich.) was inserted under the lip of the pocket. This surgical procedure was performed on both eyes. rHu-bFGF soaked disks were placed into the right eye, and the rHu-VEGF soaked disks were placed into the left eye. Vehicle soaked disks were placed in both eyes. The disk was pushed into position at the desired distance from the limbal vessels. Ophthalmic antibiotic ointment was applied to the eye to prevent drying and infection. After seven days, the rats were euthanized by CO₂ asphyxiation, and the eyes enucleated. The retinal hemisphere of the eye was windowed to facilitate fixation, and the eye placed into formalin overnight.

Post Mortem Aspects: After twenty-four hours in fixative, the corneal region of interest was dissected out from the eye, using fine forceps and a razorblade. The retinal hemisphere was trimmed off and the lens extracted and discarded. The corneal dome was bisected and the superfluous cornea trimmed off. The iris, conjunctiva and associated limbal glands were then carefully teased away. Final cuts were made to generate a square 3×3 mm containing the disk, the limbus, and the entire zone of neovascularization.

Gross Image Recording: The corneal specimens were digitally photographed using a Sony CatsEye DKC5000 camera (A. G. Heinz, Irvine Calif.) mounted on a Nikon SMZ-U stereo microscope (A. G. Heinz). The corneas were submerged in distilled water and photographed via trans-illumination at approximately 5.0 diameters magnification.

Image analysis: Numerical endpoints were generated using digital micrographs collected from the whole mount corneas after trimming and were used for image analysis on the Metamorph image analysis system (Universal Imaging Corporation, West Chester Pa.). Three measurements were taken: Disk placement distance from the limbus, number of vessels intersecting a 2.0 mm perpendicular line at the midpoint of the disk placement distance, and percent blood vessel area of the diffusion determined by thresholding.

General Formulations:

0.1% BSA in PBS vehicle: 0.025 g of BSA was added to 25.0 ml of sterile 1× phosphate buffered saline, gently shaken until fully dissolved, and filtered at 0.2 μm. Individual 1.0 mL samples were aliquoted into 25 single use vials, and stored at −20° C. until use. For the rHu-bFGF disks, a vial of this 0.1% BSA solution was allowed to thaw at RT. Once thawed, 10 μL of a 100 mM stock solution of DTT was added to the 1 ml BSA vial to yield a final concentration of 1 mM DTT in 0.1% BSA.

rHu-VEGF Dilutions:

Prior to the disk implant surgery, 23.8 μl of the 0.1% BSA vehicle above was added to a 10 μg rHu-VEGF lyophilized vial yielding a final concentration of 10 μM.

rHu-bFGF: Stock Concentration of 180 ng/μl:

R&D rHu-bFGF: Added 139 μL of the appropriate vehicle above to the 25 μg vial lyophilized vial. 13.3 μL of the [180 ng/μL] stock vial and added 26.6 μL of vehicle to yield a final concentration of 3.75 μM concentration.

Nitro-Cellulose Disk Preparation: The tip of a 20-gauge needle was cut off square and beveled with emery paper to create a punch. This tip was then used to cut out ≅0.5 mm diameter disks from a nitrocellulose filter paper sheet (Gelman Sciences). Prepared disks were then placed into Eppendorf microfuge tubes containing solutions of either 0.1% BSA in PBS vehicle, 10 μM rHu-VEGF (R&D Systems, Minneapolis, Minn.), or 3.75 μM rHu-bFGF (R&D Systems, Minneapolis, Minn.) and allowed to soak for 45-60 min before use. Each nitrocellulose filter disk absorbs approximately 0.1 μL of solution.

In the rat micropocket assay, compounds of the present invention will inhibit angiogenesis at a dose of less than 50 mg/kg/day.

Tumor Model

A431 cells (ATCC) are expanded in culture, harvested and injected subcutaneously into 5-8 week old female nude mice (CD1 nu/nu, Charles River Labs) (n=5-15). Subsequent administration of compound by oral gavage (10-200 mpk/dose) begins anywhere from day 0 to day 29 post tumor cell challenge and generally continues either once or twice a day for the duration of the experiment. Progression of tumor growth is followed by three dimensional caliper measurements and recorded as a function of time. Initial statistical analysis is done by repeated measures analysis of variance (RMANOVA), followed by Scheffe post hoc testing for multiple comparisons. Vehicle alone (Ora-Plus, pH 2.0) is the negative control. Compounds of the present invention are active at doses less than 150 mpk.

Rat Adjuvant Arthritis Model

The rat adjuvant arthritis model (Pearson, Proc. Soc. Exp. Biol. 91, 95-101 (1956)) is used to test the anti-arthritic activity of compounds of the Formula I-III, or salts thereof. Adjuvant Arthritis can be treated using two different dosing schedules: either (i) starting time of immunization with adjuvant (prophylactic dosing); or from day 15 when the arthritic response is already established (therapeutic dosing). Preferably a therapeutic dosing schedule is used.

Rat Carrageenan-Induced Analgesia Test

The rat carrageenan analgesia test was performed with materials, reagents and procedures essentially as described by Hargreaves, et al., (Pain, 32:77 (1988)). Male Sprague-Dawley rats were treated as previously described for the Carrageenan Foot Pad Edema test. Three hours after the injection of the carrageenan, the rats were placed in a special plexiglass container with a transparent floor having a high intensity lamp as a radiant heat source, positionable under the floor. After an initial twenty minute period, thermal stimulation was begun on either the injected foot or on the contralateral uninjected foot. A photoelectric cell turned off the lamp and timer when light was interrupted by paw withdrawal. The time until the rat withdraws its foot was then measured. The withdrawal latency in seconds was determined for the control and drug-treated groups, and percent inhibition of the hyperalgesic foot withdrawal determined.

Formulations

Also embraced within this invention is a class of pharmaceutical compositions comprising the active compounds of Formulas I-III in association with one or more non-toxic, pharmaceutically-acceptable carriers and/or diluents and/or adjuvants (collectively referred to herein as “carrier” materials) and, if desired, other active ingredients. The active compounds of the present invention may be administered by any suitable route, preferably in the form of a pharmaceutical composition adapted to such a route, and in a dose effective for the treatment intended. The compounds and compositions of the present invention may, for example, be administered orally, mucosally, topically, rectally, pulmonarily such as by inhalation spray, or parentally including intravascularly, intravenously, intraperitoneally, subcutaneously, intramuscularly intrasternally and infusion techniques, in dosage unit formulations containing conventional pharmaceutically acceptable carriers, adjuvants, and vehicles.

The pharmaceutically active compounds of this invention can be processed in accordance with conventional methods of pharmacy to produce medicinal agents for administration to patients, including humans and other mammals.

For oral administration, the pharmaceutical composition may be in the form of, for example, a tablet, capsule, suspension or liquid. The pharmaceutical composition is preferably made in the form of a dosage unit containing a particular amount of the active ingredient. Examples of such dosage units are tablets or capsules. For example, these may contain an amount of active ingredient from about 1 to 2000 mg, preferably from about 1 to 500 mg. A suitable daily dose for a human or other mammal may vary widely depending on the condition of the patient and other factors, but, once again, can be determined using routine methods.

The amount of compounds which are administered and the dosage regimen for treating a disease condition with the compounds and/or compositions of this invention depends on a variety of factors, including the age, weight, sex and medical condition of the subject, the type of disease, the severity of the disease, the route and frequency of administration, and the particular compound employed. Thus, the dosage regimen may vary widely, but can be determined routinely using standard methods. A daily dose of about 0.01 to 500 mg/kg body weight, preferably between about 0.1 and about 50 mg/kg body weight, may be appropriate. The daily dose can be administered in one to four doses per day.

For therapeutic purposes, the active compounds of this invention are ordinarily combined with one or more adjuvants appropriate to the indicated route of administration. If administered per os, the compounds may be admixed with lactose, sucrose, starch powder, cellulose esters of alkanoic acids, cellulose alkyl esters, talc, stearic acid, magnesium stearate, magnesium oxide, sodium and calcium salts of phosphoric and sulfuric acids, gelatin, acacia gum, sodium alginate, polyvinylpyrrolidone, and/or polyvinyl alcohol, and then tableted or encapsulated for convenient administration. Such capsules or tablets may contain a controlled-release formulation as may be provided in a dispersion of active compound in hydroxypropylmethyl cellulose.

In the case of psoriasis and other skin conditions, it may be preferable to apply a topical preparation of compounds of this invention to the affected area two to four times a day.

Formulations suitable for topical administration include liquid or semi-liquid preparations suitable for penetration through the skin (e.g., liniments, lotions, ointments, creams, or pastes) and drops suitable for administration to the eye, ear, or nose. A suitable topical dose of active ingredient of a compound of the invention is 0.1 mg to 150 mg administered one to four, preferably one or two times daily. For topical administration, the active ingredient may comprise from 0.001% to 10% w/w, e.g., from 1% to 2% by weight of the formulation, although it may comprise as much as 10% w/w, but preferably not more than 5% w/w, and more preferably from 0.1% to 1% of the formulation.

When formulated in an ointment, the active ingredients may be employed with either paraffinic or a water-miscible ointment base. Alternatively, the active ingredients may be formulated in a cream with an oil-in-water cream base. If desired, the aqueous phase of the cream base may include, for example at least 30% w/w of a polyhydric alcohol such as propylene glycol, butane-1,3-diol, mannitol, sorbitol, glycerol, polyethylene glycol and mixtures thereof. The topical formulation may desirably include a compound which enhances absorption or penetration of the active ingredient through the skin or other affected areas. Examples of such dermal penetration enhancers include DMSO and related analogs.

The compounds of this invention can also be administered by a transdermal device. Preferably transdermal administration will be accomplished using a patch either of the reservoir and porous membrane type or of a solid matrix variety. In either case, the active agent is delivered continuously from the reservoir or microcapsules through a membrane into the active agent permeable adhesive, which is in contact with the skin or mucosa of the recipient. If the active agent is absorbed through the skin, a controlled and predetermined flow of the active agent is administered to the recipient. In the case of microcapsules, the encapsulating agent may also function as the membrane.

The oily phase of the emulsions of this invention may be constituted from known ingredients in a known manner. While the phase may comprise merely an emulsifier, it may comprise a mixture of at least one emulsifier with a fat or an oil or with both a fat and an oil. Preferably, a hydrophilic emulsifier is included together with a lipophilic emulsifier which acts as a stabilizer. It is also preferred to include both an oil and a fat. Together, the emulsifier(s) with or without stabilizer(s) make-up the so-called emulsifying wax, and the wax together with the oil and fat make up the so-called emulsifying ointment base which forms the oily dispersed phase of the cream formulations. Emulsifiers and emulsion stabilizers suitable for use in the formulation of the present invention include Tween 60, Span 80, cetostearyl alcohol, myristyl alcohol, glyceryl monostearate, sodium lauryl sulfate, glyceryl distearate alone or with a wax, or other materials well known in the art.

The choice of suitable oils or fats for the formulation is based on achieving the desired cosmetic properties, since the solubility of the active compound in most oils likely to be used in pharmaceutical emulsion formulations is very low. Thus, the cream should preferably be a non-greasy, non-staining and washable product with suitable consistency to avoid leakage from tubes or other containers. Straight or branched chain, mono- or dibasic alkyl esters such as di-isoadipate, isocetyl stearate, propylene glycol diester of coconut fatty acids, isopropyl myristate, decyl oleate, isopropyl palmitate, butyl stearate, 2-ethylhexyl palmitate or a blend of branched chain esters may be used. These may be used alone or in combination depending on the properties required. Alternatively, high melting point lipids such as white soft paraffin and/or liquid paraffin or other mineral oils can be used.

Formulations suitable for topical administration to the eye also include eye drops wherein the active ingredients are dissolved or suspended in suitable carrier, especially an aqueous solvent for the active ingredients. The active ingredients are preferably present in such formulations in a concentration of 0.5 to 20%, advantageously 0.5 to 10% and particularly about 1.5% w/w.

Formulations for parenteral administration may be in the form of aqueous or non-aqueous isotonic sterile injection solutions or suspensions. These solutions and suspensions may be prepared from sterile powders or granules using one or more of the carriers or diluents mentioned for use in the formulations for oral administration or by using other suitable dispersing or wetting agents and suspending agents. The compounds may be dissolved in water, polyethylene glycol, propylene glycol, ethanol, corn oil, cottonseed oil, peanut oil, sesame oil, benzyl alcohol, sodium chloride, tragacanth gum, and/or various buffers. Other adjuvants and modes of administration are well and widely known in the pharmaceutical art. The active ingredient may also be administered by injection as a composition with suitable carriers including saline, dextrose, or water, or with cyclodextrin (ie. Captisol), cosolvent solubilization (ie. propylene glycol) or micellar solubilization (ie. Tween 80).

The sterile injectable preparation may also be a sterile injectable solution or suspension in a non-toxic parenterally acceptable diluent or solvent, for example as a solution in 1,3-butanediol. Among the acceptable vehicles and solvents that may be employed are water, Ringer's solution, and isotonic sodium chloride solution. In addition, sterile, fixed oils are conventionally employed as a solvent or suspending medium. For this purpose any bland fixed oil may be employed, including synthetic mono- or diglycerides. In addition, fatty acids such as oleic acid find use in the preparation of injectables.

For pulmonary administration, the pharmaceutical composition may be administered in the form of an aerosol or with an inhaler including dry powder aerosol.

Suppositories for rectal administration of the drug can be prepared by mixing the drug with a suitable non-irritating excipient such as cocoa butter and polyethylene glycols that are solid at ordinary temperatures but liquid at the rectal temperature and will therefore melt in the rectum and release the drug.

The pharmaceutical compositions may be subjected to conventional pharmaceutical operations such as sterilization and/or may contain conventional adjuvants, such as preservatives, stabilizers, wetting agents, emulsifiers, buffers etc. Tablets and pills can additionally be prepared with enteric coatings. Such compositions may also comprise adjuvants, such as wetting, sweetening, flavoring, and perfuming agents.

The foregoing is merely illustrative of the invention and is not intended to limit the invention to the disclosed compounds. Variations and changes which are obvious to one skilled in the art are intended to be within the scope and nature of the invention which are defined in the appended claims.

From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention, and without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.

All mentioned references, patents, applications and publications, are hereby incorporated by reference in their entirety, as if here written. 

1. Compound of Formula IV

wherein R² is selected from unsubstituted or substituted phenyl, and 9-10 membered bicyclic and 11-14 membered tricyclic unsaturated or partially unsaturated heterocyclyl, wherein substituted R² is optionally substituted with one or more substituents selected from halo, C₁₋₆-alkyl, optionally substituted C₃₋₆-cycloalkyl, optionally substituted phenyl, optionally substituted phenyl-C_(1-C) ₄-alkylenyl, C₁₋₂-haloalkoxy, optionally substituted phenyloxy, optionally substituted 4-6 membered heterocyclyl-C₁-C₆-alkyl, optionally substituted 4-6 membered heterocyclyl-C₂-C₄-alkenyl, optionally substituted 4-6 membered heterocyclyl, optionally substituted 4-6 membered heterocyclyloxy, optionally substituted 4-6 membered heterocyclyl-C₁₋₄-alkoxy, optionally substituted 4-6 membered heterocyclylsulfonyl, optionally substituted 4-6 membered heterocyclylamino, optionally substituted 4-6 membered heterocyclylcarbonyl, optionally substituted 4-6 membered heterocyclyl-C₁₋₄-alkylcarbonyl, optionally substituted 4-6 membered heterocyclylcarbonyl-C₁₋₄-alkyl, optionally substituted 4-6 membered heterocyclyl-C₁₋₄-alkylcarbonylamino, optionally substituted 4-6 membered heterocyclyl-oxycarbonylamino, C₁₋₂-haloalkyl, C₁₋₄-aminoalkyl, nitro, amino, C₁₋₃-alkylsulfonylamino, hydroxy, cyano, aminosulfonyl, C₁₋₂-alkylsulfonyl, halosulfonyl, C₁₋₄-alkylcarbonyl, amino-C₁₋₄-alkylcarbonyl, alkylcarbonyl, C₁₋₃-alkylamino-C₁₋₄-alkylcarbonyl, C₁₋₃-alkylamino-C₁₋₄-alkylcarbonylamino, C₁₋₄-alkoxycarbonyl-C₁₋₄-alkyl, C₁₋₃-alkylamino-C₁₋₃-alkyl, C₁₋₃-alkylamino-C₁₋₃-alkoxy, C₁₋₃-alkylamino-C₁₋₃-alkoxy-C₁₋₃-alkoxy, C₁₋₄-alkoxycarbonyl, C₁₋₄-alkoxycarbonylamino-C₁₋₄-alkyl, C₁₋₃-alkylsulfonylamino-C₁₋₃-alkoxy, C₁₋₄-hydroxyalkyl,

and C₁₋₄-alkoxy; wherein R^(e) and R^(f) are independently selected from H and C₁₋₂-haloalkyl; wherein R^(g) is selected from H, C₁₋₃-alkyl, optionally substituted phenyl-C₁₋₃-alkyl, 4-6 membered heterocyclyl, and optionally substituted 4-6 membered heterocyclyl-C₁-C₃-alkyl, C₁₋₃-alkoxy-C₁₋₂-alkyl and C₁₋₃-alkoxy-C₁₋₃-alkoxy-C₁₋₃-alkyl; and wherein R⁸ is one or more substituents independently selected from halo, amino, nitro, hydroxy, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy, C₁₋₆-haloalkoxy, C₁₋₆-aminoalkyl, C₁₋₆-hydroxyalkyl, optionally substituted phenyl, optionally substituted heterocyclyl, optionally substituted heterocyclyl-C₁₋₆-alkoxy, aminosulfonyl, C₃₋₆-cycloalkyl, C₁₋₆-alkylamino, C₁₋₆-alkylamino-C₁₋₆-alkyl, optionally substituted heterocyclyl-C₁₋₆-alkylamino, optionally substituted heterocyclyl-C₁₋₆-alkyl, C₁₋₆-alkylamino-C₂₋₄-alkynyl, C₁₋₆-alkylamino-C₁₋₆-alkoxy, C₁₋₆-alkylamino-C₁₋₆-alkoxy-C₁₋₆-alkoxy, and optionally substituted heterocyclyl-C₂₋₄-alkynyl; and a pharmaceutically acceptable salt thereof; provided R² is not 3-trifluoromethylphenyl when R⁸ is 4-hydroxy or 3-hydroxy. 2-20. (canceled) 21 A compound selected from: 6-amino-2,2-dimethyl-4H-benzo[1,4]oxazin-3-one; 3-(4-Boc-piperazin-1-ylmethyl)-5-trifluoromethyl-phenylamine; 3-(4-methyl-piperazin-1-ylmethyl)-4-pentafluoroethyl-phenylamine; (3-amino-5-trifluoromethyl-phenyl)-(4-Boc-piperazin-1-yl)-methanone; 7-amino-2-(4-methoxybenzyl)-4,4-dimethyl-3,4-dihydro-2H-isoquinolin-1-one; 1-(7-amino-4,4-dimethyl-3,4-dihydro-1H-isoquinolin-2-yl)-ethanone; 4-tert-butyl-3-(1-Boc-pyrrolidin-3-ylmethoxy)-phenylamine; 4-tert-butyl-3-(1-Boc-azetidin-3-ylmethoxy)-phenylamine; 3,3-dimethyl-1-(1-methyl-piperidin-4-yl)-2,3-dihydro-1H-indol-6-ylamine; {3-[3-amino-5-(trifluoromethyl)phenyl]propynyl}dimethylamine; 5-(1-methyl-(1,2,5,6-tetrahydropyrid-4-yl))-3-(trifluoro-methyl)phenylamine; 3,9,9-trimethyl-2,3,4,4a,9,9a-hexahydro-1H-3-aza-fluoren-6-ylamine; 3-(3-amino-5-trifluoromethyl-phenoxymethyl)-azetidine-1-carboxylic acid benzyl ester; 1-(1-methyl-4-piperidyl)indoline-6-ylamine; 1-acetyl-6-amino-3,3-dimethylindoline; 2-methyl-5-[1-methyl-1-(4-aminophenyl)-ethyl]-[1,3,4]oxadiazole; 4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-7-ylamine; 1-ethyl-4,4-dimethyl-1,2,3,4-tetrahydro-quinolin-7-ylamine; 4-methyl-6-[2-(1-methylpyrrolidin-2-yl)-ethyl]-pyrimidin-2-ylamine; and 4-(1,1-dimethyl-2-pyrrolidin-1-yl-ethyl-phenylamine.
 22. A compound selected from: 1-[2-(2-tert-butyl-5-nitrophenoxy)-ethyl]-piperidine; 3,3-dimethyl-1-(1-methylpiperidin-4-ylmethyl)-6-nitro-2,3-dihydro-1H-indole; 1-(4,4-dimethyl-7-nitro-3,4-dihydro-1H-isoquinolin-2-yl)-ethanone; 4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-isoquinoline; 3,3-Dimethyl-1-(1-Boc-piperidin-4-ylmethyl)-6-nitro-2,3-dihydro-1H-indole; 1-[2-(tert-butyl)-5-nitrophenyl]-4-methylpiperazine; 1-(3,3-dimethyl-6-nitro-2,3-dihydro-indol-1-yl)ethanone; 2-methyl-5-[1-methyl-1-(4-nitrophenyl)-ethyl]-[1,3,4]oxadiazole; 5-[1-methyl-1-(4-nitrophenyl)-ethyl]-1H-pyrazole; 4-[1-methyl-1-(4-nitrophenyl)-ethyl]-pyrimidine; 4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-quinoline; 1-ethyl-4,4-dimethyl-7-nitro-1,2,3,4-tetrahydro-quinoline; 7-nitro-4-spiro-1′-cyclopropane-1,2,3,4-tetrahydroisoquinoline; and 3-(2-chloro-5-nitro-phenoxymethyl)-azetidine-1-carboxylic acid tert-butyl ester. 